diff --git a/package-lock.json b/package-lock.json
index 758254d..014a42c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,6 +15,7 @@
         "pinia": "^3.0.4",
         "siwe": "^3.0.0",
         "vue": "^3.5.27",
+        "vue-i18n": "^11.2.8",
         "vue-router": "^5.0.1",
         "vuetify": "^4.0.0-beta.0",
         "ws": "^8.19.0"
@@ -1396,6 +1397,50 @@
         "url": "https://github.com/sponsors/nzakas"
       }
     },
+    "node_modules/@intlify/core-base": {
+      "version": "11.2.8",
+      "resolved": "https://registry.npmmirror.com/@intlify/core-base/-/core-base-11.2.8.tgz",
+      "integrity": "sha512-nBq6Y1tVkjIUsLsdOjDSJj4AsjvD0UG3zsg9Fyc+OivwlA/oMHSKooUy9tpKj0HqZ+NWFifweHavdljlBLTwdA==",
+      "license": "MIT",
+      "dependencies": {
+        "@intlify/message-compiler": "11.2.8",
+        "@intlify/shared": "11.2.8"
+      },
+      "engines": {
+        "node": ">= 16"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/kazupon"
+      }
+    },
+    "node_modules/@intlify/message-compiler": {
+      "version": "11.2.8",
+      "resolved": "https://registry.npmmirror.com/@intlify/message-compiler/-/message-compiler-11.2.8.tgz",
+      "integrity": "sha512-A5n33doOjmHsBtCN421386cG1tWp5rpOjOYPNsnpjIJbQ4POF0QY2ezhZR9kr0boKwaHjbOifvyQvHj2UTrDFQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@intlify/shared": "11.2.8",
+        "source-map-js": "^1.0.2"
+      },
+      "engines": {
+        "node": ">= 16"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/kazupon"
+      }
+    },
+    "node_modules/@intlify/shared": {
+      "version": "11.2.8",
+      "resolved": "https://registry.npmmirror.com/@intlify/shared/-/shared-11.2.8.tgz",
+      "integrity": "sha512-l6e4NZyUgv8VyXXH4DbuucFOBmxLF56C/mqh2tvApbzl2Hrhi1aTDcuv5TKdxzfHYmpO3UB0Cz04fgDT9vszfw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 16"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/kazupon"
+      }
+    },
     "node_modules/@isaacs/cliui": {
       "version": "8.0.2",
       "resolved": "https://registry.npmmirror.com/@isaacs/cliui/-/cliui-8.0.2.tgz",
@@ -8719,6 +8764,32 @@
         "node": ">=10"
       }
     },
+    "node_modules/vue-i18n": {
+      "version": "11.2.8",
+      "resolved": "https://registry.npmmirror.com/vue-i18n/-/vue-i18n-11.2.8.tgz",
+      "integrity": "sha512-vJ123v/PXCZntd6Qj5Jumy7UBmIuE92VrtdX+AXr+1WzdBHojiBxnAxdfctUFL+/JIN+VQH4BhsfTtiGsvVObg==",
+      "license": "MIT",
+      "dependencies": {
+        "@intlify/core-base": "11.2.8",
+        "@intlify/shared": "11.2.8",
+        "@vue/devtools-api": "^6.5.0"
+      },
+      "engines": {
+        "node": ">= 16"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/kazupon"
+      },
+      "peerDependencies": {
+        "vue": "^3.0.0"
+      }
+    },
+    "node_modules/vue-i18n/node_modules/@vue/devtools-api": {
+      "version": "6.6.4",
+      "resolved": "https://registry.npmmirror.com/@vue/devtools-api/-/devtools-api-6.6.4.tgz",
+      "integrity": "sha512-sGhTPMuXqZ1rVOk32RylztWkfXTRhuS7vgAKv0zjqk8gbsHkJ7xfFf+jbySxt7tWObEJwyKaHMikV/WGDiQm8g==",
+      "license": "MIT"
+    },
     "node_modules/vue-router": {
       "version": "5.0.2",
       "resolved": "https://registry.npmmirror.com/vue-router/-/vue-router-5.0.2.tgz",
diff --git a/package.json b/package.json
index bb251ac..9054f2a 100644
--- a/package.json
+++ b/package.json
@@ -25,6 +25,7 @@
     "pinia": "^3.0.4",
     "siwe": "^3.0.0",
     "vue": "^3.5.27",
+    "vue-i18n": "^11.2.8",
     "vue-router": "^5.0.1",
     "vuetify": "^4.0.0-beta.0",
     "ws": "^8.19.0"
diff --git a/src/App.vue b/src/App.vue
index 7d63f89..dcc1c62 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,10 +1,14 @@
 <script setup lang="ts">
 import { computed, onMounted, watch, nextTick } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
+import { useI18n } from 'vue-i18n'
 import { useUserStore } from './stores/user'
+import { useLocaleStore } from './stores/locale'
 import Toast from './components/Toast.vue'
 
 const route = useRoute()
+const { t } = useI18n()
+const localeStore = useLocaleStore()
 const router = useRouter()
 const userStore = useUserStore()
 
@@ -41,20 +45,36 @@ watch(
         icon
         variant="text"
         class="back-btn"
-        aria-label="返回"
+        :aria-label="t('common.back')"
         @click="$router.back()"
       >
         <v-icon>mdi-arrow-left</v-icon>
       </v-btn>
       <v-app-bar-title v-if="currentRoute === '/'">PolyMarket</v-app-bar-title>
       <v-spacer></v-spacer>
+      <v-menu location="bottom" :close-on-content-click="true" class="locale-menu">
+        <template #activator="{ props }">
+          <v-btn v-bind="props" icon variant="text" class="locale-btn" :aria-label="t('common.more')">
+            <v-icon size="20">mdi-translate</v-icon>
+          </v-btn>
+        </template>
+        <v-list density="compact">
+          <v-list-item
+            v-for="opt in localeStore.localeOptions"
+            :key="opt.value"
+            :title="opt.label"
+            :active="localeStore.currentLocale === opt.value"
+            @click="localeStore.setLocale(opt.value)"
+          />
+        </v-list>
+      </v-menu>
       <v-btn
         v-if="!userStore.isLoggedIn"
         text
         to="/login"
         :class="{ active: currentRoute === '/login' }"
       >
-        Login
+        {{ t('common.login') }}
       </v-btn>
       <template v-else>
         <v-btn
@@ -78,10 +98,10 @@ watch(
           </template>
           <v-list density="compact">
             <v-list-item
-              :title="userStore.user?.nickName || userStore.user?.userName || 'User'"
+              :title="userStore.user?.nickName || userStore.user?.userName || t('common.user')"
               disabled
             />
-            <v-list-item title="退出登录" @click="userStore.logout()" />
+            <v-list-item :title="t('common.logout')" @click="userStore.logout()" />
           </v-list>
         </v-menu>
       </template>
diff --git a/src/components/DepositDialog.vue b/src/components/DepositDialog.vue
index ff144c5..b96c31b 100644
--- a/src/components/DepositDialog.vue
+++ b/src/components/DepositDialog.vue
@@ -9,9 +9,9 @@
   >
     <v-card rounded="lg">
       <div class="deposit-header">
-        <h2 class="deposit-title">Deposit</h2>
-        <p class="deposit-balance">Polymarket Balance: ${{ balance }}</p>
-        <v-btn icon variant="text" class="close-btn" aria-label="关闭" @click="close">
+        <h2 class="deposit-title">{{ t('deposit.title') }}</h2>
+        <p class="deposit-balance">{{ t('deposit.polymarketBalance') }} ${{ balance }}</p>
+        <v-btn icon variant="text" class="close-btn" :aria-label="t('deposit.close')" @click="close">
           <v-icon>mdi-close</v-icon>
         </v-btn>
       </div>
@@ -29,8 +29,8 @@
                 <v-icon size="28">mdi-lightning-bolt</v-icon>
               </div>
               <div class="method-info">
-                <div class="method-name">Transfer Crypto</div>
-                <div class="method-desc">No limit • Instant</div>
+                <div class="method-name">{{ t('deposit.transferCrypto') }}</div>
+                <div class="method-desc">{{ t('deposit.noLimit') }} • {{ t('deposit.instant') }}</div>
               </div>
               <v-icon class="method-arrow">mdi-chevron-right</v-icon>
             </v-card>
@@ -44,8 +44,8 @@
                 <v-icon size="28">mdi-link-variant</v-icon>
               </div>
               <div class="method-info">
-                <div class="method-name">Connect Exchange</div>
-                <div class="method-desc">No limit • 2 min</div>
+                <div class="method-name">{{ t('deposit.connectExchange') }}</div>
+                <div class="method-desc">{{ t('deposit.noLimit') }} • {{ t('deposit.twoMin') }}</div>
               </div>
               <v-icon class="method-arrow">mdi-chevron-right</v-icon>
             </v-card>
@@ -58,26 +58,26 @@
             <v-btn icon variant="text" size="small" @click="step = 'method'">
               <v-icon>mdi-arrow-left</v-icon>
             </v-btn>
-            <span class="step-title">Transfer Crypto</span>
+            <span class="step-title">{{ t('deposit.transferCrypto') }}</span>
           </div>
           <v-select
             v-model="selectedNetwork"
             :items="networks"
             item-title="label"
             item-value="id"
-            label="Network"
+            :label="t('deposit.network')"
             variant="outlined"
             density="comfortable"
             hide-details
             class="network-select"
           />
-          <p class="support-tip">Supported: USDC, ETH</p>
+          <p class="support-tip">{{ t('deposit.supportedTip') }}</p>
           <div class="address-box">
-            <label class="address-label">Deposit address</label>
+            <label class="address-label">{{ t('deposit.depositAddress') }}</label>
             <div class="address-row">
               <code class="address-code">{{ depositAddressShort }}</code>
               <v-btn size="small" variant="tonal" @click="copyAddress">
-                {{ copied ? 'Copied' : 'Copy' }}
+                {{ copied ? t('deposit.copied') : t('deposit.copy') }}
               </v-btn>
             </div>
             <div class="qr-wrap">
@@ -92,12 +92,11 @@
             <v-btn icon variant="text" size="small" @click="step = 'method'">
               <v-icon>mdi-arrow-left</v-icon>
             </v-btn>
-            <span class="step-title">Connect Exchange</span>
+            <span class="step-title">{{ t('deposit.connectExchange') }}</span>
           </div>
           <template v-if="!exchangeConnected">
             <p class="connect-desc">
-              Connect your wallet to deposit. Send USDC or ETH to your deposit address after
-              connecting.
+              {{ t('deposit.connectDesc') }}
             </p>
             <div class="wallet-buttons">
               <v-btn
@@ -109,29 +108,29 @@
                 @click="connectMetaMask"
               >
                 <v-icon start>mdi-wallet</v-icon>
-                MetaMask
+                {{ t('deposit.metaMask') }}
               </v-btn>
               <v-btn class="wallet-btn" variant="outlined" rounded="lg" block disabled>
                 <v-icon start>mdi-wallet</v-icon>
-                Coinbase Wallet (Coming soon)
+                {{ t('deposit.coinbaseComingSoon') }}
               </v-btn>
               <v-btn class="wallet-btn" variant="outlined" rounded="lg" block disabled>
                 <v-icon start>mdi-wallet</v-icon>
-                WalletConnect (Coming soon)
+                {{ t('deposit.walletConnectComingSoon') }}
               </v-btn>
             </div>
           </template>
           <template v-else>
             <p class="connected-tip">
               <v-icon color="success" size="18">mdi-check-circle</v-icon>
-              Connected. Send USDC or ETH to the address below.
+              {{ t('deposit.connectedTip') }}
             </p>
             <div class="address-box">
-              <label class="address-label">Deposit address</label>
+              <label class="address-label">{{ t('deposit.depositAddress') }}</label>
               <div class="address-row">
                 <code class="address-code">{{ depositAddressShort }}</code>
                 <v-btn size="small" variant="tonal" @click="copyAddress">
-                  {{ copied ? 'Copied' : 'Copy' }}
+                  {{ copied ? t('deposit.copied') : t('deposit.copy') }}
                 </v-btn>
               </div>
               <div class="qr-wrap">
@@ -147,7 +146,9 @@
 
 <script setup lang="ts">
 import { ref, computed, watch } from 'vue'
+import { useI18n } from 'vue-i18n'
 
+const { t } = useI18n()
 const props = withDefaults(
   defineProps<{
     modelValue: boolean
@@ -204,7 +205,7 @@ async function copyAddress() {
 
 async function connectMetaMask() {
   if (!window.ethereum) {
-    alert('Please install MetaMask or another Web3 wallet.')
+    alert(t('deposit.installMetaMask'))
     return
   }
   connecting.value = true
diff --git a/src/components/MarketCard.vue b/src/components/MarketCard.vue
index 6892b5d..c070f46 100644
--- a/src/components/MarketCard.vue
+++ b/src/components/MarketCard.vue
@@ -36,7 +36,7 @@
             </svg>
             <div class="semi-progress-inner">
               <span class="chance-value">{{ chanceValue }}%</span>
-              <span class="chance-label">chance</span>
+              <span class="chance-label">{{ t('common.chance') }}</span>
             </div>
           </div>
         </div>
@@ -164,9 +164,11 @@
 
 <script setup lang="ts">
 import { computed, ref } from 'vue'
+import { useI18n } from 'vue-i18n'
 import { useRouter } from 'vue-router'
 import type { EventCardOutcome } from '../api/event'
 
+const { t } = useI18n()
 const router = useRouter()
 const emit = defineEmits<{
   openTrade: [
diff --git a/src/components/OrderBook.vue b/src/components/OrderBook.vue
index 7766fe7..2e454f0 100644
--- a/src/components/OrderBook.vue
+++ b/src/components/OrderBook.vue
@@ -2,11 +2,11 @@
   <v-card class="order-book" elevation="0">
     <!-- Header -->
     <div class="order-book-header">
-      <h3 class="order-book-title">Order Book</h3>
+      <h3 class="order-book-title">{{ t('trade.orderBook') }}</h3>
       <div class="order-book-vol">
         <span v-if="connected" class="live-badge">
           <span class="live-dot"></span>
-          Live
+          {{ t('activity.live') }}
         </span>
         <span v-else-if="loading" class="loading-badge">连接中...</span>
         <span v-else class="vol-text">$4.4k Vol.</span>
@@ -17,8 +17,8 @@
     <!-- Trade Tabs -->
     <div class="trade-tabs-container">
       <v-tabs v-model="activeTrade" class="trade-tabs" density="comfortable">
-        <v-tab value="up" class="trade-tab">Trade Up</v-tab>
-        <v-tab value="down" class="trade-tab">Trade Down</v-tab>
+        <v-tab value="up" class="trade-tab">{{ t('trade.buyLabel', { label: props.yesLabel }) }}</v-tab>
+        <v-tab value="down" class="trade-tab">{{ t('trade.buyLabel', { label: props.noLabel }) }}</v-tab>
       </v-tabs>
     </div>
 
@@ -80,8 +80,11 @@
 
 <script setup lang="ts">
 import { ref, computed, watch } from 'vue'
+import { useI18n } from 'vue-i18n'
 import HorizontalProgressBar from './HorizontalProgressBar.vue'
 
+const { t } = useI18n()
+
 export interface OrderBookRow {
   price: number
   shares: number
@@ -95,6 +98,10 @@ const props = withDefaults(
     spread?: number
     loading?: boolean
     connected?: boolean
+    /** 市场 Yes 选项文案，来自 market.outcomes[0] */
+    yesLabel?: string
+    /** 市场 No 选项文案，来自 market.outcomes[1] */
+    noLabel?: string
   }>(),
   {
     asks: () => [],
@@ -103,6 +110,8 @@ const props = withDefaults(
     spread: undefined,
     loading: false,
     connected: false,
+    yesLabel: 'Yes',
+    noLabel: 'No',
   },
 )
 
diff --git a/src/components/TradeComponent.vue b/src/components/TradeComponent.vue
index 364e81b..9932f72 100644
--- a/src/components/TradeComponent.vue
+++ b/src/components/TradeComponent.vue
@@ -4,29 +4,29 @@
     <!-- Header -->
     <div class="header">
       <v-tabs v-model="activeTab" class="buy-sell-tabs minimal-tabs" density="compact">
-        <v-tab value="buy" class="minimal-tab">Buy</v-tab>
-        <v-tab value="sell" class="minimal-tab">Sell</v-tab>
+        <v-tab value="buy" class="minimal-tab">{{ t('trade.buy') }}</v-tab>
+        <v-tab value="sell" class="minimal-tab">{{ t('trade.sell') }}</v-tab>
       </v-tabs>
       <v-menu>
         <template v-slot:activator="{ props, isActive }">
           <v-btn v-bind="props" class="limit-btn" text end>
-            {{ limitType }}
+            {{ limitTypeDisplay }}
             <v-icon right>{{ isActive ? 'mdi-chevron-up' : 'mdi-chevron-down' }}</v-icon>
           </v-btn>
         </template>
         <v-list>
           <v-list-item @click="limitType = 'Market'">
-            <v-list-item-title>Market</v-list-item-title>
+            <v-list-item-title>{{ t('trade.market') }}</v-list-item-title>
           </v-list-item>
           <v-list-item @click="limitType = 'Limit'">
-            <v-list-item-title>Limit</v-list-item-title>
+            <v-list-item-title>{{ t('trade.limit') }}</v-list-item-title>
           </v-list-item>
           <v-divider></v-divider>
           <v-list-item @click="openMergeDialog">
-            <v-list-item-title>Merge</v-list-item-title>
+            <v-list-item-title>{{ t('trade.merge') }}</v-list-item-title>
           </v-list-item>
           <v-list-item @click="openSplitDialog">
-            <v-list-item-title>Split</v-list-item-title>
+            <v-list-item-title>{{ t('trade.split') }}</v-list-item-title>
           </v-list-item>
         </v-list>
       </v-menu>
@@ -61,8 +61,8 @@
           <div class="input-group">
             <div class="amount-header">
               <div>
-                <span class="label amount-label">Amount</span>
-                <span class="balance-label">Balance ${{ balance.toFixed(2) }}</span>
+                <span class="label amount-label">{{ t('trade.amount') }}</span>
+                <span class="balance-label">{{ t('trade.balanceLabel') }} ${{ balance.toFixed(2) }}</span>
               </div>
               <div class="amount-value">${{ amount.toFixed(2) }}</div>
             </div>
@@ -70,7 +70,7 @@
               <v-btn class="amount-btn" @click="adjustAmount(1)">+$1</v-btn>
               <v-btn class="amount-btn" @click="adjustAmount(20)">+$20</v-btn>
               <v-btn class="amount-btn" @click="adjustAmount(100)">+$100</v-btn>
-              <v-btn class="amount-btn" @click="setMaxAmount">Max</v-btn>
+              <v-btn class="amount-btn" @click="setMaxAmount">{{ t('trade.max') }}</v-btn>
             </div>
           </div>
         </template>
@@ -78,7 +78,7 @@
         <template v-if="activeTab === 'sell'">
           <div class="input-group shares-group">
             <div class="shares-header">
-              <span class="label">Shares</span>
+              <span class="label">{{ t('trade.shares') }}</span>
               <div class="shares-input">
                 <v-text-field
                   :model-value="shares"
@@ -96,7 +96,7 @@
             <div class="shares-buttons">
               <v-btn class="share-btn" @click="setSharesPercentage(25)">25%</v-btn>
               <v-btn class="share-btn" @click="setSharesPercentage(50)">50%</v-btn>
-              <v-btn class="share-btn" @click="setSharesPercentage(100)">Max</v-btn>
+              <v-btn class="share-btn" @click="setSharesPercentage(100)">{{ t('trade.max') }}</v-btn>
             </div>
           </div>
         </template>
@@ -106,11 +106,11 @@
           <!-- Buy模式 -->
           <template v-if="activeTab === 'buy'">
             <div class="total-row">
-              <span class="label">Total</span>
+              <span class="label">{{ t('trade.total') }}</span>
               <span class="total-value">${{ totalPrice }}</span>
             </div>
             <div class="total-row">
-              <span class="label">To win</span>
+              <span class="label">{{ t('trade.toWin') }}</span>
               <span class="to-win-value">
                 <v-icon size="16" color="green">mdi-currency-usd</v-icon>
                 {{ toWinValue }}
@@ -120,7 +120,7 @@
           <!-- Sell模式 -->
           <template v-else>
             <div class="total-row">
-              <span class="label">You'll receive</span>
+              <span class="label">{{ t('trade.youllReceive') }}</span>
               <span class="to-win-value">
                 <v-icon size="16" color="green">mdi-currency-usd</v-icon>
                 {{ totalPrice }}
@@ -128,7 +128,7 @@
             </div>
             <div class="total-row avg-price-row">
               <span class="label">
-                Avg. Price {{ avgPriceCents }}¢
+                {{ t('trade.avgPrice') }} {{ avgPriceCents }}¢
                 <v-icon size="14" class="info-icon">mdi-information-outline</v-icon>
               </span>
             </div>
@@ -136,13 +136,13 @@
         </div>
 
         <p v-if="orderError" class="order-error">{{ orderError }}</p>
-        <!-- Action Button: Buy 余额足够显示 Buy Yes/No，不足显示 Deposit；Sell 只显示 Sell Yes/No -->
+        <!-- Action Button: Buy 余额足够显示 Buy Yes/No，不足显示 {{ t('trade.deposit') }}；Sell 只显示 Sell Yes/No -->
         <v-btn
           v-if="activeTab === 'buy' && showDepositForBuy"
           class="deposit-btn"
           @click="deposit"
         >
-          Deposit
+          {{ t('trade.deposit') }}
         </v-btn>
         <v-btn
           v-else
@@ -182,8 +182,8 @@
           <div class="input-group">
             <div class="amount-header">
               <div>
-                <span class="label amount-label">Amount</span>
-                <span class="balance-label">Balance ${{ balance.toFixed(2) }}</span>
+                <span class="label amount-label">{{ t('trade.amount') }}</span>
+                <span class="balance-label">{{ t('trade.balanceLabel') }} ${{ balance.toFixed(2) }}</span>
               </div>
               <div class="amount-value">${{ amount.toFixed(2) }}</div>
             </div>
@@ -193,27 +193,27 @@
               <v-btn class="amount-btn" @click="adjustAmount(1)">+$1</v-btn>
               <v-btn class="amount-btn" @click="adjustAmount(20)">+$20</v-btn>
               <v-btn class="amount-btn" @click="adjustAmount(100)">+$100</v-btn>
-              <v-btn class="amount-btn" @click="setMaxAmount">Max</v-btn>
+              <v-btn class="amount-btn" @click="setMaxAmount">{{ t('trade.max') }}</v-btn>
             </div>
 
             <!-- To win（份数 × 1U） -->
             <div v-if="amount > 0" class="total-row amount-to-win-row">
-              <span class="label">To win</span>
+              <span class="label">{{ t('trade.toWin') }}</span>
               <span class="to-win-value">
                 <v-icon size="16" color="green">mdi-currency-usd</v-icon>
                 {{ toWinValue }}
               </span>
             </div>
           </div>
-          <!-- Buy 余额不足时显示 Deposit -->
-          <v-btn class="deposit-btn" @click="deposit">Deposit</v-btn>
+          <!-- Buy 余额不足时显示 {{ t('trade.deposit') }} -->
+          <v-btn class="deposit-btn" @click="deposit">{{ t('trade.deposit') }}</v-btn>
         </template>
 
-        <!-- Sell: Shares + To receive + Avg. Price，只显示 Sell Yes/No（无 Deposit） -->
+        <!-- Sell: Shares + To receive + Avg. Price，只显示 Sell Yes/No（无 {{ t('trade.deposit') }}） -->
         <template v-else>
           <div class="input-group shares-group">
             <div class="shares-header">
-              <span class="label">Shares</span>
+              <span class="label">{{ t('trade.shares') }}</span>
               <div class="shares-input">
                 <v-text-field
                   :model-value="shares"
@@ -231,12 +231,12 @@
             <div class="shares-buttons">
               <v-btn class="share-btn" @click="setSharesPercentage(25)">25%</v-btn>
               <v-btn class="share-btn" @click="setSharesPercentage(50)">50%</v-btn>
-              <v-btn class="share-btn" @click="setSharesPercentage(100)">Max</v-btn>
+              <v-btn class="share-btn" @click="setSharesPercentage(100)">{{ t('trade.max') }}</v-btn>
             </div>
           </div>
           <div class="total-section">
             <div class="total-row">
-              <span class="label">You'll receive</span>
+              <span class="label">{{ t('trade.youllReceive') }}</span>
               <span class="to-win-value">
                 <v-icon size="16" color="green">mdi-currency-usd</v-icon>
                 {{ totalPrice }}
@@ -244,7 +244,7 @@
             </div>
             <div class="total-row avg-price-row">
               <span class="label">
-                Avg. Price {{ avgPriceCents }}¢
+                {{ t('trade.avgPrice') }} {{ avgPriceCents }}¢
                 <v-icon size="14" class="info-icon">mdi-information-outline</v-icon>
               </span>
             </div>
@@ -287,7 +287,7 @@
       <!-- Limit Price -->
       <div class="input-group limit-price-group">
         <div class="limit-price-header">
-          <span class="label">Limit Price</span>
+          <span class="label">{{ t('trade.limitPrice') }}</span>
           <div class="price-input">
             <v-btn class="adjust-btn" icon @click="decreasePrice">
               <v-icon>mdi-minus</v-icon>
@@ -316,7 +316,7 @@
       <!-- Shares -->
       <div class="input-group shares-group">
         <div class="shares-header">
-          <span class="label">Shares</span>
+          <span class="label">{{ t('trade.shares') }}</span>
           <div class="shares-input">
             <v-text-field
               :model-value="shares"
@@ -343,7 +343,7 @@
         <div v-else class="shares-buttons">
           <v-btn class="share-btn" @click="setSharesPercentage(25)">25%</v-btn>
           <v-btn class="share-btn" @click="setSharesPercentage(50)">50%</v-btn>
-          <v-btn class="share-btn" @click="setSharesPercentage(100)">Max</v-btn>
+          <v-btn class="share-btn" @click="setSharesPercentage(100)">{{ t('trade.max') }}</v-btn>
         </div>
         <div v-if="activeTab === 'buy'" class="matching-info">
           <v-icon size="14">mdi-information</v-icon>
@@ -354,7 +354,7 @@
       <!-- Set Expiration -->
       <div class="input-group expiration-group">
         <div class="expiration-header">
-          <span class="label">Set Expiration</span>
+          <span class="label">{{ t('trade.setExpiration') }}</span>
           <v-switch v-model="expirationEnabled" class="expiration-switch" hide-details></v-switch>
         </div>
         <!-- Expiration Time Dropdown -->
@@ -362,6 +362,8 @@
           v-if="expirationEnabled"
           v-model="expirationTime"
           :items="expirationOptions"
+          item-title="title"
+          item-value="value"
           class="expiration-select"
           hide-details
           density="compact"
@@ -373,11 +375,11 @@
         <!-- Buy模式 -->
         <template v-if="activeTab === 'buy'">
           <div class="total-row">
-            <span class="label">Total</span>
+            <span class="label">{{ t('trade.total') }}</span>
             <span class="total-value">${{ totalPrice }}</span>
           </div>
           <div class="total-row">
-            <span class="label">To win</span>
+            <span class="label">{{ t('trade.toWin') }}</span>
             <span class="to-win-value">
               <v-icon size="16" color="green">mdi-currency-usd</v-icon>
               {{ toWinValue }}
@@ -387,7 +389,7 @@
         <!-- Sell模式 -->
         <template v-else>
           <div class="total-row">
-            <span class="label">You'll receive</span>
+            <span class="label">{{ t('trade.youllReceive') }}</span>
             <span class="to-win-value">
               <v-icon size="16" color="green">mdi-currency-usd</v-icon>
               {{ totalPrice }}
@@ -414,29 +416,29 @@
       <div class="trade-component trade-sheet-inner">
         <div class="header">
           <v-tabs v-model="activeTab" class="buy-sell-tabs minimal-tabs" density="compact">
-            <v-tab value="buy" class="minimal-tab">Buy</v-tab>
-            <v-tab value="sell" class="minimal-tab">Sell</v-tab>
+            <v-tab value="buy" class="minimal-tab">{{ t('trade.buy') }}</v-tab>
+            <v-tab value="sell" class="minimal-tab">{{ t('trade.sell') }}</v-tab>
           </v-tabs>
           <v-menu class="limit-dropdown hide-in-mobile-sheet">
             <template v-slot:activator="{ props: limitProps, isActive }">
               <v-btn v-bind="limitProps" class="limit-btn" text end>
-                {{ limitType }}
+                {{ limitTypeDisplay }}
                 <v-icon right>{{ isActive ? 'mdi-chevron-up' : 'mdi-chevron-down' }}</v-icon>
               </v-btn>
             </template>
             <v-list>
               <v-list-item @click="limitType = 'Market'"
-                ><v-list-item-title>Market</v-list-item-title></v-list-item
+                ><v-list-item-title>{{ t('trade.market') }}</v-list-item-title></v-list-item
               >
               <v-list-item @click="limitType = 'Limit'"
-                ><v-list-item-title>Limit</v-list-item-title></v-list-item
+                ><v-list-item-title>{{ t('trade.limit') }}</v-list-item-title></v-list-item
               >
               <v-divider></v-divider>
               <v-list-item @click="openMergeDialog"
-                ><v-list-item-title>Merge</v-list-item-title></v-list-item
+                ><v-list-item-title>{{ t('trade.merge') }}</v-list-item-title></v-list-item
               >
               <v-list-item @click="openSplitDialog"
-                ><v-list-item-title>Split</v-list-item-title></v-list-item
+                ><v-list-item-title>{{ t('trade.split') }}</v-list-item-title></v-list-item
               >
             </v-list>
           </v-menu>
@@ -464,8 +466,8 @@
               <div class="input-group">
                 <div class="amount-header">
                   <div>
-                    <span class="label amount-label">Amount</span>
-                    <span class="balance-label">Balance ${{ balance.toFixed(2) }}</span>
+                    <span class="label amount-label">{{ t('trade.amount') }}</span>
+                    <span class="balance-label">{{ t('trade.balanceLabel') }} ${{ balance.toFixed(2) }}</span>
                   </div>
                   <div class="amount-value">${{ amount.toFixed(2) }}</div>
                 </div>
@@ -473,7 +475,7 @@
                   <v-btn class="amount-btn" @click="adjustAmount(1)">+$1</v-btn>
                   <v-btn class="amount-btn" @click="adjustAmount(20)">+$20</v-btn>
                   <v-btn class="amount-btn" @click="adjustAmount(100)">+$100</v-btn>
-                  <v-btn class="amount-btn" @click="setMaxAmount">Max</v-btn>
+                  <v-btn class="amount-btn" @click="setMaxAmount">{{ t('trade.max') }}</v-btn>
                 </div>
               </div>
             </template>
@@ -481,7 +483,7 @@
             <template v-if="activeTab === 'sell'">
               <div class="input-group shares-group">
                 <div class="shares-header">
-                  <span class="label">Shares</span>
+                  <span class="label">{{ t('trade.shares') }}</span>
                   <div class="shares-input">
                     <v-text-field
                       :model-value="shares"
@@ -499,17 +501,17 @@
                 <div class="shares-buttons">
                   <v-btn class="share-btn" @click="setSharesPercentage(25)">25%</v-btn>
                   <v-btn class="share-btn" @click="setSharesPercentage(50)">50%</v-btn>
-                  <v-btn class="share-btn" @click="setSharesPercentage(100)">Max</v-btn>
+                  <v-btn class="share-btn" @click="setSharesPercentage(100)">{{ t('trade.max') }}</v-btn>
                 </div>
               </div>
             </template>
             <div class="total-section">
               <template v-if="activeTab === 'buy'">
                 <div class="total-row">
-                  <span class="label">Total</span><span class="total-value">${{ totalPrice }}</span>
+                  <span class="label">{{ t('trade.total') }}</span><span class="total-value">${{ totalPrice }}</span>
                 </div>
             <div class="total-row">
-              <span class="label">To win</span
+              <span class="label">{{ t('trade.toWin') }}</span
               ><span class="to-win-value"
                 ><v-icon size="16" color="green">mdi-currency-usd</v-icon> {{ toWinValue }}</span
               >
@@ -517,7 +519,7 @@
               </template>
               <template v-else>
                 <div class="total-row">
-                  <span class="label">You'll receive</span
+                  <span class="label">{{ t('trade.youllReceive') }}</span
                   ><span class="to-win-value"
                     ><v-icon size="16" color="green">mdi-currency-usd</v-icon> {{
                       totalPrice
@@ -526,7 +528,7 @@
                 </div>
                 <div class="total-row avg-price-row">
                   <span class="label">
-                    Avg. Price {{ avgPriceCents }}¢
+                    {{ t('trade.avgPrice') }} {{ avgPriceCents }}¢
                     <v-icon size="14" class="info-icon">mdi-information-outline</v-icon>
                   </span>
                 </div>
@@ -538,7 +540,7 @@
               class="deposit-btn"
               @click="deposit"
             >
-              Deposit
+              {{ t('trade.deposit') }}
             </v-btn>
             <v-btn
               v-else
@@ -571,8 +573,8 @@
               <div class="input-group">
                 <div class="amount-header">
                   <div>
-                    <span class="label amount-label">Amount</span
-                    ><span class="balance-label">Balance ${{ balance.toFixed(2) }}</span>
+                    <span class="label amount-label">{{ t('trade.amount') }}</span
+                    ><span class="balance-label">{{ t('trade.balanceLabel') }} ${{ balance.toFixed(2) }}</span>
                   </div>
                   <div class="amount-value">${{ amount.toFixed(2) }}</div>
                 </div>
@@ -580,23 +582,23 @@
                   <v-btn class="amount-btn" @click="adjustAmount(1)">+$1</v-btn>
                   <v-btn class="amount-btn" @click="adjustAmount(20)">+$20</v-btn>
                   <v-btn class="amount-btn" @click="adjustAmount(100)">+$100</v-btn>
-                  <v-btn class="amount-btn" @click="setMaxAmount">Max</v-btn>
+                  <v-btn class="amount-btn" @click="setMaxAmount">{{ t('trade.max') }}</v-btn>
                 </div>
                 <div v-if="amount > 0" class="total-row amount-to-win-row">
-                  <span class="label">To win</span>
+                  <span class="label">{{ t('trade.toWin') }}</span>
                   <span class="to-win-value">
                     <v-icon size="16" color="green">mdi-currency-usd</v-icon>
                     {{ toWinValue }}
                   </span>
                 </div>
               </div>
-              <v-btn class="deposit-btn" @click="deposit">Deposit</v-btn>
+              <v-btn class="deposit-btn" @click="deposit">{{ t('trade.deposit') }}</v-btn>
             </template>
             <!-- Sell: Shares + To receive + Avg. Price -->
             <template v-else>
               <div class="input-group shares-group">
                 <div class="shares-header">
-                  <span class="label">Shares</span>
+                  <span class="label">{{ t('trade.shares') }}</span>
                   <div class="shares-input">
                     <v-text-field
                       :model-value="shares"
@@ -614,12 +616,12 @@
                 <div class="shares-buttons">
                   <v-btn class="share-btn" @click="setSharesPercentage(25)">25%</v-btn>
                   <v-btn class="share-btn" @click="setSharesPercentage(50)">50%</v-btn>
-                  <v-btn class="share-btn" @click="setSharesPercentage(100)">Max</v-btn>
+                  <v-btn class="share-btn" @click="setSharesPercentage(100)">{{ t('trade.max') }}</v-btn>
                 </div>
               </div>
               <div class="total-section">
                 <div class="total-row">
-                  <span class="label">You'll receive</span>
+                  <span class="label">{{ t('trade.youllReceive') }}</span>
                   <span class="to-win-value">
                     <v-icon size="16" color="green">mdi-currency-usd</v-icon>
                     {{ totalPrice }}
@@ -627,7 +629,7 @@
                 </div>
                 <div class="total-row avg-price-row">
                   <span class="label">
-                    Avg. Price {{ avgPriceCents }}¢
+                    {{ t('trade.avgPrice') }} {{ avgPriceCents }}¢
                     <v-icon size="14" class="info-icon">mdi-information-outline</v-icon>
                   </span>
                 </div>
@@ -662,7 +664,7 @@
           </div>
           <div class="input-group limit-price-group">
             <div class="limit-price-header">
-              <span class="label">Limit Price</span>
+              <span class="label">{{ t('trade.limitPrice') }}</span>
               <div class="price-input">
                 <v-btn class="adjust-btn" icon @click="decreasePrice"
                   ><v-icon>mdi-minus</v-icon></v-btn
@@ -689,7 +691,7 @@
           </div>
           <div class="input-group shares-group">
             <div class="shares-header">
-              <span class="label">Shares</span>
+              <span class="label">{{ t('trade.shares') }}</span>
               <div class="shares-input">
                 <v-text-field
                   :model-value="shares"
@@ -713,12 +715,12 @@
             <div v-else class="shares-buttons">
               <v-btn class="share-btn" @click="setSharesPercentage(25)">25%</v-btn>
               <v-btn class="share-btn" @click="setSharesPercentage(50)">50%</v-btn>
-              <v-btn class="share-btn" @click="setSharesPercentage(100)">Max</v-btn>
+              <v-btn class="share-btn" @click="setSharesPercentage(100)">{{ t('trade.max') }}</v-btn>
             </div>
           </div>
           <div class="input-group expiration-group">
             <div class="expiration-header">
-              <span class="label">Set expiration</span>
+              <span class="label">{{ t('trade.setExpiration') }}</span>
               <v-switch
                 v-model="expirationEnabled"
                 class="expiration-switch"
@@ -730,6 +732,8 @@
               v-if="expirationEnabled"
               v-model="expirationTime"
               :items="expirationOptions"
+              item-title="title"
+              item-value="value"
               class="expiration-select"
               hide-details
               density="compact"
@@ -738,10 +742,10 @@
           <div class="total-section">
             <template v-if="activeTab === 'buy'">
               <div class="total-row">
-                <span class="label">Total</span><span class="total-value">${{ totalPrice }}</span>
+                <span class="label">{{ t('trade.total') }}</span><span class="total-value">${{ totalPrice }}</span>
               </div>
             <div class="total-row">
-              <span class="label">To win</span
+              <span class="label">{{ t('trade.toWin') }}</span
               ><span class="to-win-value"
                 ><v-icon size="16" color="green">mdi-currency-usd</v-icon> {{ toWinValue }}</span
               >
@@ -749,7 +753,7 @@
             </template>
             <template v-else>
               <div class="total-row">
-                <span class="label">You'll receive</span
+                <span class="label">{{ t('trade.youllReceive') }}</span
                 ><span class="to-win-value"
                   ><v-icon size="16" color="green">mdi-currency-usd</v-icon> {{ totalPrice }}</span
                 >
@@ -781,7 +785,7 @@
         block
         @click="openSheet('yes')"
       >
-        Buy {{ yesLabel }} {{ yesPriceCents }}¢
+        {{ t('trade.buyLabel', { label: yesLabel }) }} {{ yesPriceCents }}¢
       </v-btn>
       <v-btn
         class="mobile-bar-btn mobile-bar-no"
@@ -791,7 +795,7 @@
         block
         @click="openSheet('no')"
       >
-        Buy {{ noLabel }} {{ noPriceCents }}¢
+        {{ t('trade.buyLabel', { label: noLabel }) }} {{ noPriceCents }}¢
       </v-btn>
     </div>
 
@@ -800,8 +804,8 @@
         <div class="trade-component trade-sheet-inner">
           <div class="header">
             <v-tabs v-model="activeTab" class="buy-sell-tabs minimal-tabs" density="compact">
-              <v-tab value="buy" class="minimal-tab">Buy</v-tab>
-              <v-tab value="sell" class="minimal-tab">Sell</v-tab>
+              <v-tab value="buy" class="minimal-tab">{{ t('trade.buy') }}</v-tab>
+              <v-tab value="sell" class="minimal-tab">{{ t('trade.sell') }}</v-tab>
             </v-tabs>
             <v-menu class="limit-dropdown hide-in-mobile-sheet">
               <template v-slot:activator="{ props: limitProps, isActive }">
@@ -819,10 +823,10 @@
                 >
                 <v-divider></v-divider>
                 <v-list-item @click="openMergeDialog"
-                  ><v-list-item-title>Merge</v-list-item-title></v-list-item
+                  ><v-list-item-title>{{ t('trade.merge') }}</v-list-item-title></v-list-item
                 >
                 <v-list-item @click="openSplitDialog"
-                  ><v-list-item-title>Split</v-list-item-title></v-list-item
+                  ><v-list-item-title>{{ t('trade.split') }}</v-list-item-title></v-list-item
                 >
               </v-list>
             </v-menu>
@@ -850,8 +854,8 @@
                 <div class="input-group">
                   <div class="amount-header">
                     <div>
-                      <span class="label amount-label">Amount</span>
-                      <span class="balance-label">Balance ${{ balance.toFixed(2) }}</span>
+                      <span class="label amount-label">{{ t('trade.amount') }}</span>
+                      <span class="balance-label">{{ t('trade.balanceLabel') }} ${{ balance.toFixed(2) }}</span>
                     </div>
                     <div class="amount-value">${{ amount.toFixed(2) }}</div>
                   </div>
@@ -859,7 +863,7 @@
                     <v-btn class="amount-btn" @click="adjustAmount(1)">+$1</v-btn>
                     <v-btn class="amount-btn" @click="adjustAmount(20)">+$20</v-btn>
                     <v-btn class="amount-btn" @click="adjustAmount(100)">+$100</v-btn>
-                    <v-btn class="amount-btn" @click="setMaxAmount">Max</v-btn>
+                    <v-btn class="amount-btn" @click="setMaxAmount">{{ t('trade.max') }}</v-btn>
                   </div>
                 </div>
               </template>
@@ -867,7 +871,7 @@
               <template v-if="activeTab === 'sell'">
                 <div class="input-group shares-group">
                   <div class="shares-header">
-                    <span class="label">Shares</span>
+                    <span class="label">{{ t('trade.shares') }}</span>
                     <div class="shares-input">
                       <v-text-field
                         :model-value="shares"
@@ -885,7 +889,7 @@
                   <div class="shares-buttons">
                     <v-btn class="share-btn" @click="setSharesPercentage(25)">25%</v-btn>
                     <v-btn class="share-btn" @click="setSharesPercentage(50)">50%</v-btn>
-                    <v-btn class="share-btn" @click="setSharesPercentage(100)">Max</v-btn>
+                    <v-btn class="share-btn" @click="setSharesPercentage(100)">{{ t('trade.max') }}</v-btn>
                   </div>
                 </div>
               </template>
@@ -896,7 +900,7 @@
                     ><span class="total-value">${{ totalPrice }}</span>
                   </div>
             <div class="total-row">
-              <span class="label">To win</span
+              <span class="label">{{ t('trade.toWin') }}</span
               ><span class="to-win-value"
                 ><v-icon size="16" color="green">mdi-currency-usd</v-icon> {{ toWinValue }}</span
               >
@@ -904,7 +908,7 @@
                 </template>
                 <template v-else>
                   <div class="total-row">
-                    <span class="label">You'll receive</span
+                    <span class="label">{{ t('trade.youllReceive') }}</span
                     ><span class="to-win-value"
                       ><v-icon size="16" color="green">mdi-currency-usd</v-icon> {{
                         totalPrice
@@ -913,7 +917,7 @@
                   </div>
                   <div class="total-row avg-price-row">
                     <span class="label">
-                      Avg. Price {{ avgPriceCents }}¢
+                      {{ t('trade.avgPrice') }} {{ avgPriceCents }}¢
                       <v-icon size="14" class="info-icon">mdi-information-outline</v-icon>
                     </span>
                   </div>
@@ -925,7 +929,7 @@
                 class="deposit-btn"
                 @click="deposit"
               >
-                Deposit
+                {{ t('trade.deposit') }}
               </v-btn>
               <v-btn
                 v-else
@@ -958,8 +962,8 @@
                 <div class="input-group">
                   <div class="amount-header">
                     <div>
-                      <span class="label amount-label">Amount</span
-                      ><span class="balance-label">Balance ${{ balance.toFixed(2) }}</span>
+                      <span class="label amount-label">{{ t('trade.amount') }}</span
+                      ><span class="balance-label">{{ t('trade.balanceLabel') }} ${{ balance.toFixed(2) }}</span>
                     </div>
                     <div class="amount-value">${{ amount.toFixed(2) }}</div>
                   </div>
@@ -967,23 +971,23 @@
                     <v-btn class="amount-btn" @click="adjustAmount(1)">+$1</v-btn>
                     <v-btn class="amount-btn" @click="adjustAmount(20)">+$20</v-btn>
                     <v-btn class="amount-btn" @click="adjustAmount(100)">+$100</v-btn>
-                    <v-btn class="amount-btn" @click="setMaxAmount">Max</v-btn>
+                    <v-btn class="amount-btn" @click="setMaxAmount">{{ t('trade.max') }}</v-btn>
                   </div>
                   <div v-if="amount > 0" class="total-row amount-to-win-row">
-                    <span class="label">To win</span>
+                    <span class="label">{{ t('trade.toWin') }}</span>
                     <span class="to-win-value">
                       <v-icon size="16" color="green">mdi-currency-usd</v-icon>
                       {{ toWinValue }}
                     </span>
                   </div>
                 </div>
-                <v-btn class="deposit-btn" @click="deposit">Deposit</v-btn>
+                <v-btn class="deposit-btn" @click="deposit">{{ t('trade.deposit') }}</v-btn>
               </template>
               <!-- Sell: Shares + To receive + Avg. Price -->
               <template v-else>
                 <div class="input-group shares-group">
                   <div class="shares-header">
-                    <span class="label">Shares</span>
+                    <span class="label">{{ t('trade.shares') }}</span>
                     <div class="shares-input">
                       <v-text-field
                         :model-value="shares"
@@ -1001,12 +1005,12 @@
                   <div class="shares-buttons">
                     <v-btn class="share-btn" @click="setSharesPercentage(25)">25%</v-btn>
                     <v-btn class="share-btn" @click="setSharesPercentage(50)">50%</v-btn>
-                    <v-btn class="share-btn" @click="setSharesPercentage(100)">Max</v-btn>
+                    <v-btn class="share-btn" @click="setSharesPercentage(100)">{{ t('trade.max') }}</v-btn>
                   </div>
                 </div>
                 <div class="total-section">
                   <div class="total-row">
-                    <span class="label">You'll receive</span>
+                    <span class="label">{{ t('trade.youllReceive') }}</span>
                     <span class="to-win-value">
                       <v-icon size="16" color="green">mdi-currency-usd</v-icon>
                       {{ totalPrice }}
@@ -1014,7 +1018,7 @@
                   </div>
                   <div class="total-row avg-price-row">
                     <span class="label">
-                      Avg. Price {{ avgPriceCents }}¢
+                      {{ t('trade.avgPrice') }} {{ avgPriceCents }}¢
                       <v-icon size="14" class="info-icon">mdi-information-outline</v-icon>
                     </span>
                   </div>
@@ -1049,7 +1053,7 @@
             </div>
             <div class="input-group limit-price-group">
               <div class="limit-price-header">
-                <span class="label">Limit Price</span>
+                <span class="label">{{ t('trade.limitPrice') }}</span>
                 <div class="price-input">
                   <v-btn class="adjust-btn" icon @click="decreasePrice"
                     ><v-icon>mdi-minus</v-icon></v-btn
@@ -1075,7 +1079,7 @@
             </div>
             <div class="input-group shares-group">
               <div class="shares-header">
-                <span class="label">Shares</span>
+                <span class="label">{{ t('trade.shares') }}</span>
                 <div class="shares-input">
                   <v-text-field
                     :model-value="shares"
@@ -1099,12 +1103,12 @@
               <div v-else class="shares-buttons">
                 <v-btn class="share-btn" @click="setSharesPercentage(25)">25%</v-btn>
                 <v-btn class="share-btn" @click="setSharesPercentage(50)">50%</v-btn>
-                <v-btn class="share-btn" @click="setSharesPercentage(100)">Max</v-btn>
+                <v-btn class="share-btn" @click="setSharesPercentage(100)">{{ t('trade.max') }}</v-btn>
               </div>
             </div>
             <div class="input-group expiration-group">
               <div class="expiration-header">
-                <span class="label">Set expiration</span>
+                <span class="label">{{ t('trade.setExpiration') }}</span>
                 <v-switch
                   v-model="expirationEnabled"
                   class="expiration-switch"
@@ -1116,6 +1120,8 @@
                 v-if="expirationEnabled"
                 v-model="expirationTime"
                 :items="expirationOptions"
+                item-title="title"
+                item-value="value"
                 class="expiration-select"
                 hide-details
                 density="compact"
@@ -1124,10 +1130,10 @@
             <div class="total-section">
               <template v-if="activeTab === 'buy'">
                 <div class="total-row">
-                  <span class="label">Total</span><span class="total-value">${{ totalPrice }}</span>
+                  <span class="label">{{ t('trade.total') }}</span><span class="total-value">${{ totalPrice }}</span>
                 </div>
             <div class="total-row">
-              <span class="label">To win</span
+              <span class="label">{{ t('trade.toWin') }}</span
               ><span class="to-win-value"
                 ><v-icon size="16" color="green">mdi-currency-usd</v-icon> {{ toWinValue }}</span
               >
@@ -1135,7 +1141,7 @@
               </template>
               <template v-else>
                 <div class="total-row">
-                  <span class="label">You'll receive</span
+                  <span class="label">{{ t('trade.youllReceive') }}</span
                   ><span class="to-win-value"
                     ><v-icon size="16" color="green">mdi-currency-usd</v-icon> {{
                       totalPrice
@@ -1284,12 +1290,14 @@
 
 <script setup lang="ts">
 import { ref, computed, watch, onMounted } from 'vue'
+import { useI18n } from 'vue-i18n'
 import { useDisplay } from 'vuetify'
 import { useUserStore } from '../stores/user'
 import { pmMarketMerge, pmMarketSplit, pmOrderPlace } from '../api/market'
 import { OrderType, Side } from '../api/constants'
 
 const { mobile } = useDisplay()
+const { t } = useI18n()
 const userStore = useUserStore()
 
 /** 限价单允许的 135 个价格档位（0–1 区间），规则：1–9/10–90/100–9900/9910–9990/9991–9999 */
@@ -1443,7 +1451,10 @@ const selectedOption = ref<'yes' | 'no'>(props.initialOption ?? 'no')
 const limitPrice = ref(0.82) // 初始限价，单位：美元
 const shares = ref(20) // 初始份额（正整数）
 const expirationTime = ref('5m') // 初始过期时间
-const expirationOptions = ref(['5m', '15m', '30m', '1h', '2h', '4h', '8h', '12h', '1d', '2d', '3d']) // 过期时间选项
+const EXPIRATION_VALUES = ['5m', '15m', '30m', '1h', '2h', '4h', '8h', '12h', '1d', '2d', '3d'] as const
+const expirationOptions = computed(() =>
+  EXPIRATION_VALUES.map((v) => ({ title: t(`trade.expiration.${v}`), value: v })),
+)
 
 // Market mode state
 const isMarketMode = computed(() => limitType.value === 'Market')
@@ -1503,11 +1514,13 @@ const toWinValue = computed(() => {
   return (shares.value * 1).toFixed(2)
 })
 
+const limitTypeDisplay = computed(() =>
+  limitType.value === 'Market' ? t('trade.market') : t('trade.limit'),
+)
 const actionButtonText = computed(() => {
   const label = selectedOption.value === 'yes' ? yesLabel.value : noLabel.value
   const tab = activeTab.value
-  const tabCapitalized = tab.charAt(0).toUpperCase() + tab.slice(1)
-  return `${tabCapitalized} ${label}`
+  return tab === 'buy' ? t('trade.buyLabel', { label }) : t('trade.sellLabel', { label })
 })
 
 function applyInitialOption(option: 'yes' | 'no') {
@@ -1669,9 +1682,9 @@ const canAffordBuy = computed(() => {
   return bal >= cost
 })
 
-/** Buy 模式且余额不足时显示 Deposit，否则显示 Buy Yes/No */
 const showDepositForBuy = computed(() => !canAffordBuy.value)
 
+/** Buy 模式且余额不足时显示 Deposit，否则显示 Buy Yes/No */
 const deposit = () => {
   console.log('Depositing amount:', amount.value)
   // 实际应用中，这里应该调用存款API
@@ -1711,12 +1724,12 @@ async function submitOrder() {
   emit('submit', payload)
 
   if (!tokenId) {
-    orderError.value = '请先选择市场（需包含 clobTokenIds）'
+    orderError.value = t('trade.pleaseSelectMarket')
     return
   }
   const headers = userStore.getAuthHeaders()
   if (!headers) {
-    orderError.value = '请先登录'
+    orderError.value = t('trade.pleaseLogin')
     return
   }
   const uid = userStore?.user?.ID ?? 0
@@ -1729,7 +1742,7 @@ async function submitOrder() {
         : 0
   if (!Number.isFinite(userIdNum) || userIdNum <= 0) {
     console.warn('[submitOrder] 用户信息异常: user=', userStore.user, 'uid=', uid)
-    orderError.value = '用户信息异常'
+    orderError.value = t('trade.userError')
     return
   }
 
@@ -1767,10 +1780,10 @@ async function submitOrder() {
       userStore.fetchUsdcBalance()
       emit('orderSuccess')
     } else {
-      orderError.value = res.msg || '下单失败'
+      orderError.value = res.msg || t('trade.orderFailed')
     }
   } catch (e) {
-    orderError.value = e instanceof Error ? e.message : 'Request failed'
+    orderError.value = e instanceof Error ? e.message : t('error.requestFailed')
   } finally {
     orderLoading.value = false
   }
diff --git a/src/components/WithdrawDialog.vue b/src/components/WithdrawDialog.vue
index 6ebed2e..a2bdfba 100644
--- a/src/components/WithdrawDialog.vue
+++ b/src/components/WithdrawDialog.vue
@@ -9,9 +9,9 @@
   >
     <v-card rounded="lg">
       <div class="withdraw-header">
-        <h2 class="withdraw-title">Withdraw</h2>
-        <p class="withdraw-balance">Polymarket Balance: ${{ balance }}</p>
-        <v-btn icon variant="text" class="close-btn" aria-label="关闭" @click="close">
+        <h2 class="withdraw-title">{{ t('withdraw.title') }}</h2>
+        <p class="withdraw-balance">{{ t('withdraw.polymarketBalance') }} ${{ balance }}</p>
+        <v-btn icon variant="text" class="close-btn" :aria-label="t('withdraw.close')" @click="close">
           <v-icon>mdi-close</v-icon>
         </v-btn>
       </div>
@@ -21,16 +21,16 @@
           type="number"
           min="0"
           step="0.01"
-          label="Amount (USD)"
+          :label="t('withdraw.amountUsd')"
           variant="outlined"
           density="comfortable"
           hide-details
           class="amount-field"
-          placeholder="0.00"
+          :placeholder="t('withdraw.amountPlaceholder')"
           @keypress="allowDecimal"
         >
           <template #append-inner>
-            <v-btn variant="text" size="small" class="max-btn" @click="setMax">Max</v-btn>
+            <v-btn variant="text" size="small" class="max-btn" @click="setMax">{{ t('withdraw.max') }}</v-btn>
           </template>
         </v-text-field>
 
@@ -39,7 +39,7 @@
           :items="networks"
           item-title="label"
           item-value="id"
-          label="Network"
+          :label="t('withdraw.network')"
           variant="outlined"
           density="comfortable"
           hide-details
@@ -47,10 +47,10 @@
         />
 
         <div class="destination-section">
-          <label class="section-label">Withdraw to</label>
+          <label class="section-label">{{ t('withdraw.withdrawTo') }}</label>
           <v-radio-group v-model="destinationType" hide-details class="destination-radio">
-            <v-radio value="wallet" label="Connected wallet" />
-            <v-radio value="address" label="Custom address" />
+            <v-radio value="wallet" :label="t('withdraw.connectedWallet')" />
+            <v-radio value="address" :label="t('withdraw.customAddress')" />
           </v-radio-group>
           <template v-if="destinationType === 'wallet'">
             <v-btn
@@ -63,7 +63,7 @@
               @click="connectWallet"
             >
               <v-icon start>mdi-wallet</v-icon>
-              Connect Wallet
+              {{ t('withdraw.connectWallet') }}
             </v-btn>
             <div v-else class="connected-address">
               <v-icon color="success" size="18">mdi-check-circle</v-icon>
@@ -73,11 +73,11 @@
           <v-text-field
             v-else
             v-model="customAddress"
-            label="Wallet address"
+            :label="t('withdraw.walletAddress')"
             variant="outlined"
             density="comfortable"
             hide-details
-            placeholder="0x..."
+            :placeholder="t('withdraw.addressPlaceholder')"
             class="address-field"
           />
         </div>
@@ -95,7 +95,7 @@
           :disabled="!canSubmit"
           @click="submitWithdraw"
         >
-          Withdraw
+          {{ t('withdraw.title') }}
         </v-btn>
       </v-card-text>
     </v-card>
@@ -104,7 +104,9 @@
 
 <script setup lang="ts">
 import { ref, computed, watch } from 'vue'
+import { useI18n } from 'vue-i18n'
 
+const { t } = useI18n()
 const props = withDefaults(
   defineProps<{
     modelValue: boolean
@@ -134,8 +136,8 @@ const amountNum = computed(() => parseFloat(amount.value) || 0)
 
 const amountError = computed(() => {
   if (!amount.value) return ''
-  if (amountNum.value <= 0) return 'Amount must be greater than 0'
-  if (amountNum.value > balanceNum.value) return 'Insufficient balance'
+  if (amountNum.value <= 0) return t('withdraw.amountMustBePositive')
+  if (amountNum.value > balanceNum.value) return t('withdraw.insufficientBalance')
   return ''
 })
 
@@ -173,7 +175,7 @@ function allowDecimal(e: KeyboardEvent) {
 
 async function connectWallet() {
   if (!window.ethereum) {
-    alert('Please install MetaMask or another Web3 wallet.')
+    alert(t('deposit.installMetaMask'))
     return
   }
   connecting.value = true
diff --git a/src/locales/en.json b/src/locales/en.json
new file mode 100644
index 0000000..51ba7fd
--- /dev/null
+++ b/src/locales/en.json
@@ -0,0 +1,172 @@
+{
+  "common": {
+    "login": "Login",
+    "logout": "Log out",
+    "balance": "Balance",
+    "back": "Back",
+    "search": "Search",
+    "filter": "Filter",
+    "collapse": "Collapse",
+    "delete": "Delete",
+    "clear": "Clear",
+    "loading": "Loading...",
+    "more": "More",
+    "user": "User",
+    "chance": "chance"
+  },
+  "toast": {
+    "orderSuccess": "Order placed successfully"
+  },
+  "trade": {
+    "buy": "Buy",
+    "sell": "Sell",
+    "orderBook": "Order Book",
+    "buyLabel": "Buy {label}",
+    "sellLabel": "Sell {label}",
+    "merge": "Merge",
+    "split": "Split",
+    "market": "Market",
+    "limit": "Limit",
+    "deposit": "Deposit",
+    "amount": "Amount",
+    "shares": "Shares",
+    "limitPrice": "Limit Price",
+    "setExpiration": "Set expiration",
+    "total": "Total",
+    "toWin": "To win",
+    "youllReceive": "You'll receive",
+    "avgPrice": "Avg. Price",
+    "max": "Max",
+    "balanceLabel": "Balance",
+    "pleaseLogin": "Please log in first",
+    "pleaseSelectMarket": "Please select a market (with clobTokenIds)",
+    "userError": "User info error",
+    "orderFailed": "Order failed",
+    "expiration": {
+      "5m": "5m",
+      "15m": "15m",
+      "30m": "30m",
+      "1h": "1h",
+      "2h": "2h",
+      "4h": "4h",
+      "8h": "8h",
+      "12h": "12h",
+      "1d": "1d",
+      "2d": "2d",
+      "3d": "3d"
+    }
+  },
+  "home": {
+    "searchHistory": "Search history",
+    "searchPlaceholder": "Search",
+    "loadMore": "Load more"
+  },
+  "error": {
+    "requestFailed": "Request failed",
+    "loadFailed": "Load failed",
+    "invalidId": "Invalid ID or slug"
+  },
+  "activity": {
+    "comments": "Comments",
+    "topHolders": "Top Holders",
+    "activity": "Activity",
+    "noCommentsYet": "No comments yet.",
+    "topHoldersPlaceholder": "Top holders will appear here.",
+    "minAmount": "Min amount",
+    "any": "Any",
+    "live": "Live",
+    "bought": "bought",
+    "sold": "sold",
+    "at": "at",
+    "viewTransaction": "View transaction",
+    "justNow": "just now",
+    "minutesAgo": "{n}m ago",
+    "hoursAgo": "{n}h ago",
+    "daysAgo": "{n}d ago",
+    "weeksAgo": "{n}w ago"
+  },
+  "wallet": {
+    "portfolio": "Portfolio",
+    "today": "Today",
+    "deposit": "Deposit",
+    "withdraw": "Withdraw",
+    "profitLoss": "Profit/Loss",
+    "allTime": "All-Time",
+    "pl1D": "1D",
+    "pl1W": "1W",
+    "pl1M": "1M",
+    "plAll": "ALL",
+    "positions": "Positions",
+    "openOrders": "Open orders",
+    "history": "History",
+    "searchPlaceholder": "Search",
+    "currentValue": "Current value",
+    "closeLosses": "Close Losses",
+    "all": "All",
+    "newest": "Newest",
+    "export": "Export",
+    "cancelAll": "Cancel all",
+    "noPositionsFound": "No positions found.",
+    "noOpenOrdersFound": "No open orders found.",
+    "noHistoryFound": "You haven't traded any polymarkets yet",
+    "market": "Market",
+    "avgNow": "AVG → NOW",
+    "bet": "BET",
+    "toWin": "TO WIN",
+    "value": "VALUE",
+    "action": "ACTION",
+    "side": "SIDE",
+    "outcome": "OUTCOME",
+    "price": "PRICE",
+    "filled": "FILLED",
+    "total": "TOTAL",
+    "expiration": "EXPIRATION",
+    "activity": "ACTIVITY",
+    "view": "View",
+    "expirationLabel": "Expiration:"
+  },
+  "deposit": {
+    "title": "Deposit",
+    "polymarketBalance": "Polymarket Balance:",
+    "transferCrypto": "Transfer Crypto",
+    "connectExchange": "Connect Exchange",
+    "noLimit": "No limit",
+    "instant": "Instant",
+    "twoMin": "2 min",
+    "network": "Network",
+    "supportedTip": "Supported: USDC, ETH",
+    "depositAddress": "Deposit address",
+    "copy": "Copy",
+    "copied": "Copied",
+    "connectDesc": "Connect your wallet to deposit. Send USDC or ETH to your deposit address after connecting.",
+    "connectedTip": "Connected. Send USDC or ETH to the address below.",
+    "metaMask": "MetaMask",
+    "coinbaseComingSoon": "Coinbase Wallet (Coming soon)",
+    "walletConnectComingSoon": "WalletConnect (Coming soon)",
+    "close": "Close",
+    "installMetaMask": "Please install MetaMask or another Web3 wallet."
+  },
+  "withdraw": {
+    "title": "Withdraw",
+    "polymarketBalance": "Polymarket Balance:",
+    "amountUsd": "Amount (USD)",
+    "max": "Max",
+    "network": "Network",
+    "withdrawTo": "Withdraw to",
+    "connectedWallet": "Connected wallet",
+    "customAddress": "Custom address",
+    "connectWallet": "Connect Wallet",
+    "walletAddress": "Wallet address",
+    "amountPlaceholder": "0.00",
+    "addressPlaceholder": "0x...",
+    "amountMustBePositive": "Amount must be greater than 0",
+    "insufficientBalance": "Insufficient balance",
+    "close": "Close"
+  },
+  "locale": {
+    "zh": "简体中文",
+    "en": "English",
+    "ja": "日本語",
+    "ko": "한국어"
+  }
+}
diff --git a/src/locales/ja.json b/src/locales/ja.json
new file mode 100644
index 0000000..cc2c93c
--- /dev/null
+++ b/src/locales/ja.json
@@ -0,0 +1,172 @@
+{
+  "common": {
+    "login": "ログイン",
+    "logout": "ログアウト",
+    "balance": "残高",
+    "back": "戻る",
+    "search": "検索",
+    "filter": "フィルター",
+    "collapse": "閉じる",
+    "delete": "削除",
+    "clear": "クリア",
+    "loading": "読み込み中...",
+    "more": "その他",
+    "user": "ユーザー",
+    "chance": "確率"
+  },
+  "toast": {
+    "orderSuccess": "注文が完了しました"
+  },
+  "trade": {
+    "buy": "買う",
+    "sell": "売る",
+    "orderBook": "オーダーブック",
+    "buyLabel": "{label}を買う",
+    "sellLabel": "{label}を売る",
+    "merge": "マージ",
+    "split": "スプリット",
+    "market": "成行",
+    "limit": "指値",
+    "deposit": "入金",
+    "amount": "金額",
+    "shares": "シェア",
+    "limitPrice": "指値",
+    "setExpiration": "有効期限を設定",
+    "total": "合計",
+    "toWin": "獲得見込み",
+    "youllReceive": "受け取り額",
+    "avgPrice": "平均価格",
+    "max": "最大",
+    "balanceLabel": "残高",
+    "pleaseLogin": "先にログインしてください",
+    "pleaseSelectMarket": "市場を選択してください（clobTokenIds が必要）",
+    "userError": "ユーザー情報エラー",
+    "orderFailed": "注文に失敗しました",
+    "expiration": {
+      "5m": "5分",
+      "15m": "15分",
+      "30m": "30分",
+      "1h": "1時間",
+      "2h": "2時間",
+      "4h": "4時間",
+      "8h": "8時間",
+      "12h": "12時間",
+      "1d": "1日",
+      "2d": "2日",
+      "3d": "3日"
+    }
+  },
+  "home": {
+    "searchHistory": "検索履歴",
+    "searchPlaceholder": "検索",
+    "loadMore": "もっと読み込む"
+  },
+  "error": {
+    "requestFailed": "リクエストに失敗しました",
+    "loadFailed": "読み込みに失敗しました",
+    "invalidId": "無効な ID または slug"
+  },
+  "activity": {
+    "comments": "コメント",
+    "topHolders": "持倉トップ",
+    "activity": "アクティビティ",
+    "noCommentsYet": "コメントはまだありません",
+    "topHoldersPlaceholder": "持倉トップがここに表示されます",
+    "minAmount": "最小金額",
+    "any": "任意",
+    "live": "ライブ",
+    "bought": "購入",
+    "sold": "売却",
+    "at": "で",
+    "viewTransaction": "取引を表示",
+    "justNow": "たった今",
+    "minutesAgo": "{n}分前",
+    "hoursAgo": "{n}時間前",
+    "daysAgo": "{n}日前",
+    "weeksAgo": "{n}週間前"
+  },
+  "wallet": {
+    "portfolio": "ポートフォリオ",
+    "today": "今日",
+    "deposit": "入金",
+    "withdraw": "出金",
+    "profitLoss": "損益",
+    "allTime": "全期間",
+    "pl1D": "1日",
+    "pl1W": "1週",
+    "pl1M": "1月",
+    "plAll": "全て",
+    "positions": "ポジション",
+    "openOrders": "未約定",
+    "history": "履歴",
+    "searchPlaceholder": "検索",
+    "currentValue": "現在価値",
+    "closeLosses": "損失決済",
+    "all": "全て",
+    "newest": "新しい順",
+    "export": "エクスポート",
+    "cancelAll": "一括キャンセル",
+    "noPositionsFound": "ポジションがありません",
+    "noOpenOrdersFound": "未約定注文がありません",
+    "noHistoryFound": "まだ取引履歴がありません",
+    "market": "市場",
+    "avgNow": "平均→現在",
+    "bet": "ベット",
+    "toWin": "獲得",
+    "value": "価値",
+    "action": "操作",
+    "side": "方向",
+    "outcome": "結果",
+    "price": "価格",
+    "filled": "約定",
+    "total": "合計",
+    "expiration": "有効期限",
+    "activity": "アクティビティ",
+    "view": "表示",
+    "expirationLabel": "有効期限:"
+  },
+  "deposit": {
+    "title": "入金",
+    "polymarketBalance": "Polymarket 残高：",
+    "transferCrypto": "暗号資産を送金",
+    "connectExchange": "取引所を接続",
+    "noLimit": "制限なし",
+    "instant": "即時",
+    "twoMin": "約2分",
+    "network": "ネットワーク",
+    "supportedTip": "対応：USDC、ETH",
+    "depositAddress": "入金アドレス",
+    "copy": "コピー",
+    "copied": "コピーしました",
+    "connectDesc": "入金するにはウォレットを接続してください。接続後、USDC または ETH を入金アドレスに送金してください。",
+    "connectedTip": "接続済み。以下のアドレスに USDC または ETH を送金してください。",
+    "metaMask": "MetaMask",
+    "coinbaseComingSoon": "Coinbase Wallet（近日公開）",
+    "walletConnectComingSoon": "WalletConnect（近日公開）",
+    "close": "閉じる",
+    "installMetaMask": "MetaMask または他の Web3 ウォレットをインストールしてください。"
+  },
+  "withdraw": {
+    "title": "出金",
+    "polymarketBalance": "Polymarket 残高：",
+    "amountUsd": "金額 (USD)",
+    "max": "最大",
+    "network": "ネットワーク",
+    "withdrawTo": "出金先",
+    "connectedWallet": "接続済みウォレット",
+    "customAddress": "カスタムアドレス",
+    "connectWallet": "ウォレットを接続",
+    "walletAddress": "ウォレットアドレス",
+    "amountPlaceholder": "0.00",
+    "addressPlaceholder": "0x...",
+    "amountMustBePositive": "金額は 0 より大きい必要があります",
+    "insufficientBalance": "残高不足",
+    "close": "閉じる"
+  },
+  "locale": {
+    "zh": "简体中文",
+    "en": "English",
+    "ja": "日本語",
+    "ko": "한국어"
+  }
+}
diff --git a/src/locales/ko.json b/src/locales/ko.json
new file mode 100644
index 0000000..ad03355
--- /dev/null
+++ b/src/locales/ko.json
@@ -0,0 +1,172 @@
+{
+  "common": {
+    "login": "로그인",
+    "logout": "로그아웃",
+    "balance": "잔액",
+    "back": "뒤로",
+    "search": "검색",
+    "filter": "필터",
+    "collapse": "접기",
+    "delete": "삭제",
+    "clear": "지우기",
+    "loading": "로딩 중...",
+    "more": "더보기",
+    "user": "사용자",
+    "chance": "확률"
+  },
+  "toast": {
+    "orderSuccess": "주문이 완료되었습니다"
+  },
+  "trade": {
+    "buy": "매수",
+    "sell": "매도",
+    "orderBook": "호가창",
+    "buyLabel": "{label} 매수",
+    "sellLabel": "{label} 매도",
+    "merge": "병합",
+    "split": "분할",
+    "market": "시장가",
+    "limit": "지정가",
+    "deposit": "입금",
+    "amount": "금액",
+    "shares": "주식",
+    "limitPrice": "지정가",
+    "setExpiration": "만료 설정",
+    "total": "합계",
+    "toWin": "획득 예상",
+    "youllReceive": "수령 예정",
+    "avgPrice": "평균 가격",
+    "max": "최대",
+    "balanceLabel": "잔액",
+    "pleaseLogin": "먼저 로그인하세요",
+    "pleaseSelectMarket": "시장을 선택하세요 (clobTokenIds 필요)",
+    "userError": "사용자 정보 오류",
+    "orderFailed": "주문 실패",
+    "expiration": {
+      "5m": "5분",
+      "15m": "15분",
+      "30m": "30분",
+      "1h": "1시간",
+      "2h": "2시간",
+      "4h": "4시간",
+      "8h": "8시간",
+      "12h": "12시간",
+      "1d": "1일",
+      "2d": "2일",
+      "3d": "3일"
+    }
+  },
+  "home": {
+    "searchHistory": "검색 기록",
+    "searchPlaceholder": "검색",
+    "loadMore": "더 불러오기"
+  },
+  "error": {
+    "requestFailed": "요청 실패",
+    "loadFailed": "로드 실패",
+    "invalidId": "잘못된 ID 또는 slug"
+  },
+  "activity": {
+    "comments": "댓글",
+    "topHolders": "보유자 순위",
+    "activity": "활동",
+    "noCommentsYet": "아직 댓글이 없습니다",
+    "topHoldersPlaceholder": "보유자 순위가 여기에 표시됩니다",
+    "minAmount": "최소 금액",
+    "any": "모두",
+    "live": "실시간",
+    "bought": "매수",
+    "sold": "매도",
+    "at": "에",
+    "viewTransaction": "거래 보기",
+    "justNow": "방금",
+    "minutesAgo": "{n}분 전",
+    "hoursAgo": "{n}시간 전",
+    "daysAgo": "{n}일 전",
+    "weeksAgo": "{n}주 전"
+  },
+  "wallet": {
+    "portfolio": "포트폴리오",
+    "today": "오늘",
+    "deposit": "입금",
+    "withdraw": "출금",
+    "profitLoss": "손익",
+    "allTime": "전체",
+    "pl1D": "1일",
+    "pl1W": "1주",
+    "pl1M": "1월",
+    "plAll": "전체",
+    "positions": "포지션",
+    "openOrders": "미체결",
+    "history": "내역",
+    "searchPlaceholder": "검색",
+    "currentValue": "현재 가치",
+    "closeLosses": "손실 청산",
+    "all": "전체",
+    "newest": "최신순",
+    "export": "내보내기",
+    "cancelAll": "전체 취소",
+    "noPositionsFound": "포지션이 없습니다",
+    "noOpenOrdersFound": "미체결 주문이 없습니다",
+    "noHistoryFound": "아직 거래 내역이 없습니다",
+    "market": "시장",
+    "avgNow": "평균→현재",
+    "bet": "베팅",
+    "toWin": "획득",
+    "value": "가치",
+    "action": "작업",
+    "side": "방향",
+    "outcome": "결과",
+    "price": "가격",
+    "filled": "체결",
+    "total": "합계",
+    "expiration": "만료",
+    "activity": "활동",
+    "view": "보기",
+    "expirationLabel": "만료:"
+  },
+  "deposit": {
+    "title": "입금",
+    "polymarketBalance": "Polymarket 잔액:",
+    "transferCrypto": "암호화폐 전송",
+    "connectExchange": "거래소 연결",
+    "noLimit": "제한 없음",
+    "instant": "즉시",
+    "twoMin": "약 2분",
+    "network": "네트워크",
+    "supportedTip": "지원: USDC, ETH",
+    "depositAddress": "입금 주소",
+    "copy": "복사",
+    "copied": "복사됨",
+    "connectDesc": "입금하려면 지갑을 연결하세요. 연결 후 USDC 또는 ETH를 입금 주소로 보내세요.",
+    "connectedTip": "연결됨. 아래 주소로 USDC 또는 ETH를 보내세요.",
+    "metaMask": "MetaMask",
+    "coinbaseComingSoon": "Coinbase Wallet (출시 예정)",
+    "walletConnectComingSoon": "WalletConnect (출시 예정)",
+    "close": "닫기",
+    "installMetaMask": "MetaMask 또는 다른 Web3 지갑을 설치해 주세요."
+  },
+  "withdraw": {
+    "title": "출금",
+    "polymarketBalance": "Polymarket 잔액:",
+    "amountUsd": "금액 (USD)",
+    "max": "최대",
+    "network": "네트워크",
+    "withdrawTo": "출금 대상",
+    "connectedWallet": "연결된 지갑",
+    "customAddress": "사용자 지정 주소",
+    "connectWallet": "지갑 연결",
+    "walletAddress": "지갑 주소",
+    "amountPlaceholder": "0.00",
+    "addressPlaceholder": "0x...",
+    "amountMustBePositive": "금액은 0보다 커야 합니다",
+    "insufficientBalance": "잔액 부족",
+    "close": "닫기"
+  },
+  "locale": {
+    "zh": "简体中文",
+    "en": "English",
+    "ja": "日本語",
+    "ko": "한국어"
+  }
+}
diff --git a/src/locales/zh-CN.json b/src/locales/zh-CN.json
new file mode 100644
index 0000000..a62f3a8
--- /dev/null
+++ b/src/locales/zh-CN.json
@@ -0,0 +1,172 @@
+{
+  "common": {
+    "login": "登录",
+    "logout": "退出登录",
+    "balance": "余额",
+    "back": "返回",
+    "search": "搜索",
+    "filter": "筛选",
+    "collapse": "收起",
+    "delete": "删除",
+    "clear": "清空",
+    "loading": "加载中...",
+    "more": "更多操作",
+    "user": "用户",
+    "chance": "概率"
+  },
+  "toast": {
+    "orderSuccess": "下单成功"
+  },
+  "trade": {
+    "buy": "买入",
+    "sell": "卖出",
+    "orderBook": "订单簿",
+    "buyLabel": "买{label}",
+    "sellLabel": "卖{label}",
+    "merge": "合并",
+    "split": "拆分",
+    "market": "市价",
+    "limit": "限价",
+    "deposit": "入金",
+    "amount": "金额",
+    "shares": "份额",
+    "limitPrice": "限价",
+    "setExpiration": "设置到期",
+    "total": "合计",
+    "toWin": "可获得",
+    "youllReceive": "您将收到",
+    "avgPrice": "平均价",
+    "max": "最大",
+    "balanceLabel": "余额",
+    "pleaseLogin": "请先登录",
+    "pleaseSelectMarket": "请先选择市场（需包含 clobTokenIds）",
+    "userError": "用户信息异常",
+    "orderFailed": "下单失败",
+    "expiration": {
+      "5m": "5分钟",
+      "15m": "15分钟",
+      "30m": "30分钟",
+      "1h": "1小时",
+      "2h": "2小时",
+      "4h": "4小时",
+      "8h": "8小时",
+      "12h": "12小时",
+      "1d": "1天",
+      "2d": "2天",
+      "3d": "3天"
+    }
+  },
+  "home": {
+    "searchHistory": "搜索历史",
+    "searchPlaceholder": "Search",
+    "loadMore": "加载更多"
+  },
+  "error": {
+    "requestFailed": "请求失败",
+    "loadFailed": "加载失败",
+    "invalidId": "无效的 ID 或 slug"
+  },
+  "activity": {
+    "comments": "评论",
+    "topHolders": "持仓大户",
+    "activity": "动态",
+    "noCommentsYet": "暂无评论",
+    "topHoldersPlaceholder": "持仓大户将在此显示",
+    "minAmount": "最小金额",
+    "any": "任意",
+    "live": "实时",
+    "bought": "买入",
+    "sold": "卖出",
+    "at": "以",
+    "viewTransaction": "查看交易",
+    "justNow": "刚刚",
+    "minutesAgo": "{n}分钟前",
+    "hoursAgo": "{n}小时前",
+    "daysAgo": "{n}天前",
+    "weeksAgo": "{n}周前"
+  },
+  "wallet": {
+    "portfolio": "资产组合",
+    "today": "今日",
+    "deposit": "入金",
+    "withdraw": "提现",
+    "profitLoss": "盈亏",
+    "allTime": "全部",
+    "pl1D": "1天",
+    "pl1W": "1周",
+    "pl1M": "1月",
+    "plAll": "全部",
+    "positions": "持仓",
+    "openOrders": "未成交",
+    "history": "历史",
+    "searchPlaceholder": "搜索",
+    "currentValue": "当前价值",
+    "closeLosses": "平仓亏损",
+    "all": "全部",
+    "newest": "最新",
+    "export": "导出",
+    "cancelAll": "全部撤单",
+    "noPositionsFound": "暂无持仓",
+    "noOpenOrdersFound": "暂无未成交订单",
+    "noHistoryFound": "您还未进行过任何交易",
+    "market": "市场",
+    "avgNow": "均价→现价",
+    "bet": "投注",
+    "toWin": "可赢",
+    "value": "价值",
+    "action": "操作",
+    "side": "方向",
+    "outcome": "结果",
+    "price": "价格",
+    "filled": "成交",
+    "total": "合计",
+    "expiration": "到期",
+    "activity": "活动",
+    "view": "查看",
+    "expirationLabel": "到期"
+  },
+  "deposit": {
+    "title": "入金",
+    "polymarketBalance": "Polymarket 余额：",
+    "transferCrypto": "转账加密货币",
+    "connectExchange": "连接交易所",
+    "noLimit": "无限制",
+    "instant": "即时到账",
+    "twoMin": "约 2 分钟",
+    "network": "网络",
+    "supportedTip": "支持：USDC、ETH",
+    "depositAddress": "充值地址",
+    "copy": "复制",
+    "copied": "已复制",
+    "connectDesc": "连接钱包以充值。连接后，将 USDC 或 ETH 发送至您的充值地址。",
+    "connectedTip": "已连接。请将 USDC 或 ETH 发送至下方地址。",
+    "metaMask": "MetaMask",
+    "coinbaseComingSoon": "Coinbase Wallet（即将推出）",
+    "walletConnectComingSoon": "WalletConnect（即将推出）",
+    "close": "关闭",
+    "installMetaMask": "请安装 MetaMask 或其他 Web3 钱包。"
+  },
+  "withdraw": {
+    "title": "提现",
+    "polymarketBalance": "Polymarket 余额：",
+    "amountUsd": "金额 (USD)",
+    "max": "最大",
+    "network": "网络",
+    "withdrawTo": "提现至",
+    "connectedWallet": "已连接钱包",
+    "customAddress": "自定义地址",
+    "connectWallet": "连接钱包",
+    "walletAddress": "钱包地址",
+    "amountPlaceholder": "0.00",
+    "addressPlaceholder": "0x...",
+    "amountMustBePositive": "金额必须大于 0",
+    "insufficientBalance": "余额不足",
+    "close": "关闭"
+  },
+  "locale": {
+    "zh": "简体中文",
+    "en": "English",
+    "ja": "日本語",
+    "ko": "한국어"
+  }
+}
diff --git a/src/main.ts b/src/main.ts
index 5520653..1fc1111 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -4,11 +4,13 @@ import { createPinia } from 'pinia'
 import App from './App.vue'
 import router from './router'
 import vuetify from './plugins/vuetify'
+import { i18n } from './plugins/i18n'
 
 const app = createApp(App)
 
 app.use(createPinia())
 app.use(router)
+app.use(i18n)
 app.use(vuetify)
 
 app.mount('#app')
diff --git a/src/plugins/i18n.ts b/src/plugins/i18n.ts
new file mode 100644
index 0000000..3bc1856
--- /dev/null
+++ b/src/plugins/i18n.ts
@@ -0,0 +1,44 @@
+import { createI18n } from 'vue-i18n'
+import zhCN from '../locales/zh-CN.json'
+import en from '../locales/en.json'
+import ja from '../locales/ja.json'
+import ko from '../locales/ko.json'
+
+export type LocaleCode = 'zh-CN' | 'en' | 'ja' | 'ko'
+
+const LOCALE_STORAGE_KEY = 'poly-locale'
+
+export const defaultLocale: LocaleCode = 'zh-CN'
+
+function loadSavedLocale(): LocaleCode {
+  try {
+    const saved = localStorage.getItem(LOCALE_STORAGE_KEY)
+    if (saved && ['zh-CN', 'en', 'ja', 'ko'].includes(saved)) {
+      return saved as LocaleCode
+    }
+  } catch {
+    //
+  }
+  return defaultLocale
+}
+
+export const i18n = createI18n({
+  legacy: false,
+  locale: loadSavedLocale(),
+  fallbackLocale: 'en',
+  messages: {
+    'zh-CN': zhCN as Record<string, unknown>,
+    en: en as Record<string, unknown>,
+    ja: ja as Record<string, unknown>,
+    ko: ko as Record<string, unknown>,
+  },
+})
+
+export function setLocale(locale: LocaleCode) {
+  i18n.global.locale.value = locale
+  try {
+    localStorage.setItem(LOCALE_STORAGE_KEY, locale)
+  } catch {
+    //
+  }
+}
diff --git a/src/stores/locale.ts b/src/stores/locale.ts
new file mode 100644
index 0000000..c3a098f
--- /dev/null
+++ b/src/stores/locale.ts
@@ -0,0 +1,21 @@
+import { computed } from 'vue'
+import { defineStore } from 'pinia'
+import type { LocaleCode } from '@/plugins/i18n'
+import { i18n, setLocale as setI18nLocale } from '@/plugins/i18n'
+
+export const useLocaleStore = defineStore('locale', () => {
+  const currentLocale = computed(() => i18n.global.locale.value as LocaleCode)
+
+  const localeOptions: { value: LocaleCode; label: string }[] = [
+    { value: 'zh-CN', label: '简体中文' },
+    { value: 'en', label: 'English' },
+    { value: 'ja', label: '日本語' },
+    { value: 'ko', label: '한국어' },
+  ]
+
+  function setLocale(loc: LocaleCode) {
+    setI18nLocale(loc)
+  }
+
+  return { currentLocale, localeOptions, setLocale }
+})
diff --git a/src/views/EventMarkets.vue b/src/views/EventMarkets.vue
index eea35f3..fb9d76e 100644
--- a/src/views/EventMarkets.vue
+++ b/src/views/EventMarkets.vue
@@ -3,7 +3,7 @@
     <v-card v-if="detailLoading && !eventDetail" class="loading-card" elevation="0" rounded="lg">
       <div class="loading-placeholder">
         <v-progress-circular indeterminate color="primary" size="48" />
-        <p>加载中...</p>
+        <p>{{ t('common.loading') }}</p>
       </div>
     </v-card>
 
@@ -155,10 +155,10 @@
             </template>
             <v-list density="compact">
               <v-list-item @click="openMergeFromBar">
-                <v-list-item-title>Merge</v-list-item-title>
+                <v-list-item-title>{{ t('trade.merge') }}</v-list-item-title>
               </v-list-item>
               <v-list-item @click="openSplitFromBar">
-                <v-list-item-title>Split</v-list-item-title>
+                <v-list-item-title>{{ t('trade.split') }}</v-list-item-title>
               </v-list-item>
             </v-list>
           </v-menu>
@@ -198,10 +198,12 @@ import {
   type PmEventMarketItem,
 } from '../api/event'
 import { MOCK_EVENT_LIST } from '../api/mockEventList'
+import { useI18n } from 'vue-i18n'
 import { useUserStore } from '../stores/user'
 import { useToastStore } from '../stores/toast'
 
 const route = useRoute()
+const { t } = useI18n()
 const router = useRouter()
 const userStore = useUserStore()
 const { mobile } = useDisplay()
@@ -564,7 +566,7 @@ function onTradeSubmit(payload: {
 const toastStore = useToastStore()
 function onOrderSuccess() {
   tradeSheetOpen.value = false
-  toastStore.show('下单成功')
+  toastStore.show(t('toast.orderSuccess'))
 }
 
 function marketChance(market: PmEventMarketItem): number {
@@ -619,7 +621,7 @@ async function loadEventDetail() {
   const idRaw = route.params.id
   const idStr = String(idRaw ?? '').trim()
   if (!idStr) {
-    detailError.value = '无效的 ID 或 slug'
+    detailError.value = t('error.invalidId')
     eventDetail.value = null
     return
   }
@@ -646,7 +648,7 @@ async function loadEventDetail() {
         eventDetail.value = fallback
         detailError.value = null
       } else {
-        detailError.value = res.msg || '加载失败'
+        detailError.value = res.msg || t('error.loadFailed')
         eventDetail.value = null
       }
     }
@@ -656,7 +658,7 @@ async function loadEventDetail() {
       eventDetail.value = fallback
       detailError.value = null
     } else {
-      detailError.value = e instanceof Error ? e.message : '加载失败'
+      detailError.value = e instanceof Error ? e.message : t('error.loadFailed')
       eventDetail.value = null
     }
   } finally {
diff --git a/src/views/Home.vue b/src/views/Home.vue
index 3b43ac9..773df98 100644
--- a/src/views/Home.vue
+++ b/src/views/Home.vue
@@ -18,7 +18,7 @@
             variant="text"
             size="small"
             class="home-category-action-btn"
-            aria-label="搜索"
+            :aria-label="t('common.search')"
             @click="expandSearch"
           >
             <v-icon size="20">mdi-magnify</v-icon>
@@ -28,7 +28,7 @@
             variant="text"
             size="small"
             class="home-category-action-btn"
-            aria-label="筛选"
+            :aria-label="t('common.filter')"
           >
             <v-icon size="20">mdi-filter-outline</v-icon>
           </v-btn>
@@ -43,7 +43,7 @@
               v-model="searchKeyword"
               density="compact"
               hide-details
-              placeholder="Search"
+              :placeholder="t('home.searchPlaceholder')"
               prepend-inner-icon="mdi-magnify"
               variant="outlined"
               class="home-search-overlay-field"
@@ -55,7 +55,7 @@
               variant="text"
               size="small"
               class="home-search-close-btn"
-              aria-label="收起"
+              :aria-label="t('common.collapse')"
               @click="collapseSearch"
             >
               <v-icon size="18">mdi-close</v-icon>
@@ -63,7 +63,7 @@
           </div>
           <div v-if="searchHistoryList.length > 0" class="home-search-history">
             <div class="home-search-history-header">
-              <span class="home-search-history-title">搜索历史</span>
+              <span class="home-search-history-title">{{ t('home.searchHistory') }}</span>
               <v-btn
                 variant="text"
                 size="x-small"
@@ -71,7 +71,7 @@
                 class="home-search-history-clear"
                 @click="searchHistory.clearAll"
               >
-                清空
+                {{ t('common.clear') }}
               </v-btn>
             </div>
             <ul class="home-search-history-list">
@@ -92,7 +92,7 @@
                   variant="text"
                   size="x-small"
                   class="home-search-history-delete"
-                  aria-label="删除"
+                  :aria-label="t('common.delete')"
                   @click.stop="searchHistory.remove(idx)"
                 >
                   <v-icon size="16">mdi-close</v-icon>
@@ -175,7 +175,7 @@
               <div ref="sentinelRef" class="load-more-sentinel" aria-hidden="true" />
               <div v-if="loadingMore" class="load-more-indicator">
                 <v-progress-circular indeterminate size="24" width="2" />
-                <span>加载中...</span>
+                <span>{{ t('common.loading') }}</span>
               </div>
               <div v-else-if="noMoreEvents" class="no-more-tip">没有更多了</div>
               <v-btn
@@ -186,7 +186,7 @@
                 :disabled="loadingMore"
                 @click="loadMore"
               >
-                加载更多
+                {{ t('home.loadMore') }}
               </v-btn>
             </div>
           </div>
@@ -322,10 +322,12 @@ import {
   resolveCategoryIconColor,
   type CategoryTreeNode,
 } from '../api/category'
+import { useI18n } from 'vue-i18n'
 import { useSearchHistory } from '../composables/useSearchHistory'
 import { useToastStore } from '../stores/toast'
 
 const { mobile } = useDisplay()
+const { t } = useI18n()
 const searchHistory = useSearchHistory()
 const searchHistoryList = computed(() => searchHistory.list.value)
 const isMobile = computed(() => mobile.value)
@@ -526,7 +528,7 @@ function onCardOpenTrade(
 const toastStore = useToastStore()
 function onOrderSuccess() {
   tradeDialogOpen.value = false
-  toastStore.show('下单成功')
+  toastStore.show(t('toast.orderSuccess'))
 }
 
 /** 传给 TradeComponent 的 market（Home 弹窗/底部栏），供 Split、下单等使用 */
diff --git a/src/views/TradeDetail.vue b/src/views/TradeDetail.vue
index 52c719e..a642595 100644
--- a/src/views/TradeDetail.vue
+++ b/src/views/TradeDetail.vue
@@ -8,14 +8,14 @@
           <!-- 顶部：标题、当前概率、Past / 日期 -->
           <div class="chart-header">
             <h1 class="chart-title">
-              {{ detailLoading && !eventDetail ? '加载中...' : marketTitle }}
+              {{ detailLoading && !eventDetail ? t('common.loading') : marketTitle }}
             </h1>
             <p v-if="detailError" class="chart-error">{{ detailError }}</p>
             <div class="chart-controls-row">
               <v-btn variant="text" size="small" class="past-btn">Past ▾</v-btn>
               <v-btn class="date-pill" size="small" rounded="pill">{{ resolutionDate }}</v-btn>
             </div>
-            <div class="chart-chance">{{ currentChance }}% chance</div>
+            <div class="chart-chance">{{ currentChance }}% {{ t('common.chance') }}</div>
           </div>
 
           <!-- 图表区域 -->
@@ -53,22 +53,24 @@
             :spread="clobSpread"
             :loading="clobLoading"
             :connected="clobConnected"
+            :yes-label="yesLabel"
+            :no-label="noLabel"
           />
         </v-card>
 
         <!-- Comments / Top Holders / Activity（与左侧图表、订单簿同宽） -->
         <v-card class="activity-card" elevation="0" rounded="lg">
           <v-tabs v-model="detailTab" class="detail-tabs" density="comfortable">
-            <v-tab value="comments">Comments</v-tab>
-            <v-tab value="holders">Top Holders</v-tab>
-            <v-tab value="activity">Activity</v-tab>
+            <v-tab value="comments">{{ t('activity.comments') }}</v-tab>
+            <v-tab value="holders">{{ t('activity.topHolders') }}</v-tab>
+            <v-tab value="activity">{{ t('activity.activity') }}</v-tab>
           </v-tabs>
           <v-window v-model="detailTab" class="detail-window">
             <v-window-item value="comments" class="detail-pane">
-              <div class="placeholder-pane">No comments yet.</div>
+              <div class="placeholder-pane">{{ t('activity.noCommentsYet') }}</div>
             </v-window-item>
             <v-window-item value="holders" class="detail-pane">
-              <div class="placeholder-pane">Top holders will appear here.</div>
+              <div class="placeholder-pane">{{ t('activity.topHoldersPlaceholder') }}</div>
             </v-window-item>
             <v-window-item value="activity" class="detail-pane">
               <div class="activity-toolbar">
@@ -78,12 +80,12 @@
                   density="compact"
                   hide-details
                   variant="outlined"
-                  label="Min amount"
+                  :label="t('activity.minAmount')"
                   class="min-amount-select"
                 />
                 <span class="live-badge">
                   <span class="live-dot"></span>
-                  Live
+                  {{ t('activity.live') }}
                 </span>
               </div>
               <div class="activity-list">
@@ -98,18 +100,18 @@
                   </div>
                   <div class="activity-body">
                     <span class="activity-user">{{ item.user }}</span>
-                    <span class="activity-action">{{ item.action }}</span>
+                    <span class="activity-action">{{ t(item.action === 'bought' ? 'activity.bought' : 'activity.sold') }}</span>
                     <span
                       :class="['activity-amount', item.side === 'Yes' ? 'amount-yes' : 'amount-no']"
                     >
                       {{ item.amount }} {{ item.side }}
                     </span>
-                    <span class="activity-price">at {{ item.price }}</span>
+                    <span class="activity-price">{{ t('activity.at') }} {{ item.price }}</span>
                     <span class="activity-total">({{ item.total }})</span>
                   </div>
                   <div class="activity-meta">
                     <span class="activity-time">{{ formatTimeAgo(item.time) }}</span>
-                    <a href="#" class="activity-link" aria-label="View transaction" @click.prevent>
+                    <a href="#" class="activity-link" :aria-label="t('activity.viewTransaction')" @click.prevent>
                       <v-icon size="16">mdi-open-in-new</v-icon>
                     </a>
                   </div>
@@ -167,10 +169,10 @@
             </template>
             <v-list density="compact">
               <v-list-item @click="openMergeFromBar">
-                <v-list-item-title>Merge</v-list-item-title>
+                <v-list-item-title>{{ t('trade.merge') }}</v-list-item-title>
               </v-list-item>
               <v-list-item @click="openSplitFromBar">
-                <v-list-item-title>Split</v-list-item-title>
+                <v-list-item-title>{{ t('trade.split') }}</v-list-item-title>
               </v-list-item>
             </v-list>
           </v-menu>
@@ -192,6 +194,7 @@
 <script setup lang="ts">
 import { ref, computed, onMounted, onUnmounted, watch, nextTick } from 'vue'
 import { useRoute } from 'vue-router'
+import { useI18n } from 'vue-i18n'
 import { useDisplay } from 'vuetify'
 import * as echarts from 'echarts'
 import type { ECharts } from 'echarts'
@@ -207,6 +210,8 @@ import {
 import { getClobWsUrl } from '../api/request'
 import { useUserStore } from '../stores/user'
 import { useToastStore } from '../stores/toast'
+
+const { t } = useI18n()
 import {
   ClobSdk,
   type PriceSizePolyMsg,
@@ -271,7 +276,7 @@ async function loadEventDetail() {
   const idRaw = route.params.id
   const idStr = String(idRaw ?? '').trim()
   if (!idStr) {
-    detailError.value = '无效的 ID 或 slug'
+    detailError.value = t('error.invalidId')
     eventDetail.value = null
     return
   }
@@ -292,11 +297,11 @@ async function loadEventDetail() {
     if (res.code === 0 || res.code === 200) {
       eventDetail.value = res.data ?? null
     } else {
-      detailError.value = res.msg || '加载失败'
+      detailError.value = res.msg || t('error.loadFailed')
       eventDetail.value = null
     }
   } catch (e) {
-    detailError.value = e instanceof Error ? e.message : '加载失败'
+    detailError.value = e instanceof Error ? e.message : t('error.loadFailed')
     eventDetail.value = null
   } finally {
     detailLoading.value = false
@@ -531,19 +536,19 @@ function openSplitFromBar() {
 const toastStore = useToastStore()
 function onOrderSuccess() {
   tradeSheetOpen.value = false
-  toastStore.show('下单成功')
+  toastStore.show(t('toast.orderSuccess'))
 }
 
 // Comments / Top Holders / Activity
 const detailTab = ref('activity')
 const activityMinAmount = ref<string>('0')
-const minAmountOptions = [
-  { title: 'Any', value: '0' },
+const minAmountOptions = computed(() => [
+  { title: t('activity.any'), value: '0' },
   { title: '$1', value: '1' },
   { title: '$10', value: '10' },
   { title: '$100', value: '100' },
   { title: '$500', value: '500' },
-]
+])
 
 interface ActivityItem {
   id: string
@@ -636,11 +641,11 @@ const filteredActivity = computed(() => {
 
 function formatTimeAgo(ts: number): string {
   const sec = Math.floor((Date.now() - ts) / 1000)
-  if (sec < 60) return 'just now'
-  if (sec < 3600) return `${Math.floor(sec / 60)}m ago`
-  if (sec < 86400) return `${Math.floor(sec / 3600)}h ago`
-  if (sec < 604800) return `${Math.floor(sec / 86400)}d ago`
-  return `${Math.floor(sec / 604800)}w ago`
+  if (sec < 60) return t('activity.justNow')
+  if (sec < 3600) return t('activity.minutesAgo', { n: Math.floor(sec / 60) })
+  if (sec < 86400) return t('activity.hoursAgo', { n: Math.floor(sec / 3600) })
+  if (sec < 604800) return t('activity.daysAgo', { n: Math.floor(sec / 86400) })
+  return t('activity.weeksAgo', { n: Math.floor(sec / 604800) })
 }
 
 // 时间粒度
diff --git a/src/views/Wallet.vue b/src/views/Wallet.vue
index 1d20bab..fd68be6 100644
--- a/src/views/Wallet.vue
+++ b/src/views/Wallet.vue
@@ -6,7 +6,7 @@
         <v-card class="wallet-card portfolio-card" elevation="0" rounded="lg">
           <div class="card-header">
             <span class="card-title">
-              Portfolio
+              {{ t('wallet.portfolio') }}
               <v-icon size="16" class="title-icon">mdi-eye-off-outline</v-icon>
             </span>
             <div class="balance-badge">
@@ -15,7 +15,7 @@
             </div>
           </div>
           <div class="card-value">${{ portfolioBalance }}</div>
-          <div class="card-timeframe">Today</div>
+          <div class="card-timeframe">{{ t('wallet.today') }}</div>
           <div class="card-actions">
             <v-btn
               color="primary"
@@ -24,7 +24,7 @@
               prepend-icon="mdi-arrow-down"
               @click="depositDialogOpen = true"
             >
-              Deposit
+              {{ t('wallet.deposit') }}
             </v-btn>
             <v-btn
               variant="outlined"
@@ -33,7 +33,7 @@
               prepend-icon="mdi-arrow-up"
               @click="withdrawDialogOpen = true"
             >
-              Withdraw
+              {{ t('wallet.withdraw') }}
             </v-btn>
           </div>
         </v-card>
@@ -43,19 +43,19 @@
           <div class="card-header">
             <span class="card-title">
               <v-icon size="16" color="success">mdi-triangle-small-up</v-icon>
-              Profit/Loss
+              {{ t('wallet.profitLoss') }}
             </span>
             <div class="pl-tabs">
               <v-btn
-                v-for="t in plTimeRanges"
-                :key="t"
-                :variant="plRange === t ? 'flat' : 'text'"
-                :color="plRange === t ? 'primary' : undefined"
+                v-for="tr in plTimeRanges"
+                :key="tr.value"
+                :variant="plRange === tr.value ? 'flat' : 'text'"
+                :color="plRange === tr.value ? 'primary' : undefined"
                 size="small"
                 class="pl-tab"
-                @click="plRange = t"
+                @click="plRange = tr.value"
               >
-                {{ t }}
+                {{ tr.label }}
               </v-btn>
             </div>
           </div>
@@ -63,7 +63,7 @@
             <span class="card-value">${{ profitLoss }}</span>
             <v-icon size="18" class="info-icon">mdi-information-outline</v-icon>
           </div>
-          <div class="card-timeframe">All-Time</div>
+          <div class="card-timeframe">{{ t('wallet.allTime') }}</div>
           <div ref="plChartRef" class="pl-chart"></div>
         </v-card>
       </v-col>
@@ -72,14 +72,14 @@
     <!-- 下方：Positions / Open orders / History -->
     <div class="wallet-section">
       <v-tabs v-model="activeTab" class="wallet-tabs" density="comfortable">
-        <v-tab value="positions">Positions</v-tab>
-        <v-tab value="orders">Open orders</v-tab>
-        <v-tab value="history">History</v-tab>
+        <v-tab value="positions">{{ t('wallet.positions') }}</v-tab>
+        <v-tab value="orders">{{ t('wallet.openOrders') }}</v-tab>
+        <v-tab value="history">{{ t('wallet.history') }}</v-tab>
       </v-tabs>
       <div class="toolbar">
         <v-text-field
           v-model="search"
-          placeholder="Search"
+          :placeholder="t('wallet.searchPlaceholder')"
           density="compact"
           hide-details
           variant="outlined"
@@ -96,34 +96,34 @@
             @click="closeLosses"
           >
             <v-icon size="18">mdi-delete-outline</v-icon>
-            Close Losses
+            {{ t('wallet.closeLosses') }}
           </v-btn>
           <v-btn variant="outlined" size="small" class="filter-btn">
             <v-icon size="18">mdi-filter</v-icon>
-            All
+            {{ t('wallet.all') }}
           </v-btn>
           <v-btn variant="outlined" size="small" class="filter-btn">
             <v-icon size="18">mdi-sort</v-icon>
-            Newest
+            {{ t('wallet.newest') }}
           </v-btn>
           <v-btn variant="outlined" size="small" class="filter-btn" icon>
             <v-icon size="18">mdi-calendar</v-icon>
           </v-btn>
           <v-btn variant="outlined" size="small" class="filter-btn">
             <v-icon size="18">mdi-download</v-icon>
-            Export
+            {{ t('wallet.export') }}
           </v-btn>
         </template>
         <template v-else-if="activeTab === 'positions'">
           <v-btn variant="outlined" size="small" class="filter-btn">
             <v-icon size="18">mdi-filter</v-icon>
-            Current value
+            {{ t('wallet.currentValue') }}
           </v-btn>
         </template>
         <template v-else-if="activeTab === 'orders'">
           <v-btn variant="outlined" size="small" class="filter-btn">
             <v-icon size="18">mdi-filter</v-icon>
-            Market
+            {{ t('wallet.market') }}
           </v-btn>
           <v-btn
             variant="outlined"
@@ -132,12 +132,12 @@
             @click="cancelAllOrders"
           >
             <v-icon size="18">mdi-close</v-icon>
-            Cancel all
+            {{ t('wallet.cancelAll') }}
           </v-btn>
         </template>
         <v-btn v-else variant="outlined" size="small" class="filter-btn">
           <v-icon size="18">mdi-filter</v-icon>
-          Market
+          {{ t('wallet.market') }}
         </v-btn>
       </div>
       <v-card class="table-card" elevation="0" rounded="lg">
@@ -146,7 +146,7 @@
           <!-- 移动端：可折叠列表 -->
           <div v-if="mobile" class="positions-mobile-list">
             <template v-if="filteredPositions.length === 0">
-              <div class="empty-cell">No positions found.</div>
+              <div class="empty-cell">{{ t('wallet.noPositionsFound') }}</div>
             </template>
             <div
               v-for="pos in paginatedPositions"
@@ -213,7 +213,7 @@
                     size="small"
                     class="position-sell-btn"
                     @click="sellPosition(pos.id)"
-                    >Sell</v-btn
+                    >{{ t('trade.sell') }}</v-btn
                   >
                   <v-btn
                     icon
@@ -232,23 +232,23 @@
           <v-table v-else class="wallet-table positions-table-full">
             <thead>
               <tr>
-                <th class="text-left">MARKET</th>
+                <th class="text-left">{{ t('wallet.market') }}</th>
                 <th class="text-left">
-                  AVG → NOW
+                  {{ t('wallet.avgNow') }}
                   <v-icon size="14" class="th-icon">mdi-information-outline</v-icon>
                 </th>
-                <th class="text-left">BET</th>
-                <th class="text-left">TO WIN</th>
+                <th class="text-left">{{ t('wallet.bet') }}</th>
+                <th class="text-left">{{ t('wallet.toWin') }}</th>
                 <th class="text-left">
-                  VALUE
+                  {{ t('wallet.value') }}
                   <v-icon size="14" class="th-icon">mdi-chevron-down</v-icon>
                 </th>
-                <th class="text-right">ACTION</th>
+                <th class="text-right">{{ t('wallet.action') }}</th>
               </tr>
             </thead>
             <tbody>
               <tr v-if="filteredPositions.length === 0">
-                <td colspan="6" class="empty-cell">No positions found.</td>
+                <td colspan="6" class="empty-cell">{{ t('wallet.noPositionsFound') }}</td>
               </tr>
               <tr v-for="pos in paginatedPositions" :key="pos.id" class="position-row">
                 <td class="cell-market">
@@ -296,7 +296,7 @@
                     size="small"
                     class="position-sell-btn"
                     @click="sellPosition(pos.id)"
-                    >Sell</v-btn
+                    >{{ t('trade.sell') }}</v-btn
                   >
                   <v-btn
                     icon
@@ -317,7 +317,7 @@
           <!-- 移动端：挂单卡片列表 -->
           <div v-if="mobile" class="orders-mobile-list">
             <template v-if="filteredOpenOrders.length === 0">
-              <div class="empty-cell">No open orders found.</div>
+              <div class="empty-cell">{{ t('wallet.noOpenOrdersFound') }}</div>
             </template>
             <div v-for="ord in paginatedOpenOrders" :key="ord.id" class="order-mobile-card">
               <div class="order-mobile-icon" :class="ord.iconClass">
@@ -346,7 +346,7 @@
                   <v-icon size="20">mdi-close</v-icon>
                 </v-btn>
                 <div class="order-mobile-filled">{{ ord.filledDisplay || ord.filled }}</div>
-                <div class="order-mobile-expiry">Expiration: {{ ord.expiration }}</div>
+                <div class="order-mobile-expiry">{{ t('wallet.expirationLabel') }} {{ ord.expiration }}</div>
               </div>
             </div>
           </div>
@@ -354,19 +354,19 @@
           <v-table v-else class="wallet-table">
             <thead>
               <tr>
-                <th class="text-left">MARKET</th>
-                <th class="text-left">SIDE</th>
-                <th class="text-left">OUTCOME</th>
-                <th class="text-left">PRICE</th>
-                <th class="text-left">FILLED</th>
-                <th class="text-left">TOTAL</th>
-                <th class="text-left">EXPIRATION</th>
-                <th class="text-right">ACTION</th>
+                <th class="text-left">{{ t('wallet.market') }}</th>
+                <th class="text-left">{{ t('wallet.side') }}</th>
+                <th class="text-left">{{ t('wallet.outcome') }}</th>
+                <th class="text-left">{{ t('wallet.price') }}</th>
+                <th class="text-left">{{ t('wallet.filled') }}</th>
+                <th class="text-left">{{ t('wallet.total') }}</th>
+                <th class="text-left">{{ t('wallet.expiration') }}</th>
+                <th class="text-right">{{ t('wallet.action') }}</th>
               </tr>
             </thead>
             <tbody>
               <tr v-if="filteredOpenOrders.length === 0">
-                <td colspan="8" class="empty-cell">No open orders found.</td>
+                <td colspan="8" class="empty-cell">{{ t('wallet.noOpenOrdersFound') }}</td>
               </tr>
               <tr v-for="ord in paginatedOpenOrders" :key="ord.id">
                 <td class="cell-market">{{ ord.market }}</td>
@@ -397,7 +397,7 @@
           <!-- 移动端：历史卡片列表 -->
           <div v-if="mobile" class="history-mobile-list">
             <template v-if="filteredHistory.length === 0">
-              <div class="empty-cell">You haven't traded any polymarkets yet</div>
+              <div class="empty-cell">{{ t('wallet.noHistoryFound') }}</div>
             </template>
             <div
               v-for="h in paginatedHistory"
@@ -437,7 +437,7 @@
                     size="small"
                     class="history-view-btn"
                     @click="viewHistory(h.id)"
-                    >View</v-btn
+                    >{{ t('wallet.view') }}</v-btn
                   >
                   <v-btn
                     icon
@@ -456,14 +456,14 @@
           <v-table v-else class="wallet-table">
             <thead>
               <tr>
-                <th class="text-left">ACTIVITY</th>
-                <th class="text-left">MARKET</th>
-                <th class="text-left">VALUE</th>
+                <th class="text-left">{{ t('wallet.activity') }}</th>
+                <th class="text-left">{{ t('wallet.market') }}</th>
+                <th class="text-left">{{ t('wallet.value') }}</th>
               </tr>
             </thead>
             <tbody>
               <tr v-if="filteredHistory.length === 0">
-                <td colspan="3" class="empty-cell">You haven't traded any polymarkets yet</td>
+                <td colspan="3" class="empty-cell">{{ t('wallet.noHistoryFound') }}</td>
               </tr>
               <tr v-for="h in paginatedHistory" :key="h.id">
                 <td>
@@ -563,7 +563,10 @@
 
 <script setup lang="ts">
 import { ref, computed, watch, onMounted, onUnmounted, nextTick } from 'vue'
+import { useI18n } from 'vue-i18n'
 import { useDisplay } from 'vuetify'
+
+const { t } = useI18n()
 import * as echarts from 'echarts'
 import type { ECharts } from 'echarts'
 import DepositDialog from '../components/DepositDialog.vue'
@@ -576,7 +579,12 @@ const userStore = useUserStore()
 const portfolioBalance = computed(() => userStore.balance)
 const profitLoss = ref('0.00')
 const plRange = ref('ALL')
-const plTimeRanges = ['1D', '1W', '1M', 'ALL']
+const plTimeRanges = computed(() => [
+  { label: t('wallet.pl1D'), value: '1D' },
+  { label: t('wallet.pl1W'), value: '1W' },
+  { label: t('wallet.pl1M'), value: '1M' },
+  { label: t('wallet.plAll'), value: 'ALL' },
+])
 const activeTab = ref<'positions' | 'orders' | 'history'>('positions')
 const search = ref('')
 const depositDialogOpen = ref(false)