diff --git a/README_i18n.md b/README_i18n.md
new file mode 100644
index 0000000..1caf9b9
--- /dev/null
+++ b/README_i18n.md
@@ -0,0 +1,76 @@
+# CC Switch 国际化功能说明
+
+## 已完成的工作
+
+1. **安装依赖**：添加了 `react-i18next` 和 `i18next` 包
+2. **配置国际化**：在 `src/i18n/` 目录下创建了配置文件
+3. **翻译文件**：创建了英文和中文翻译文件
+4. **组件更新**：替换了主要组件中的硬编码文案
+5. **语言切换器**：添加了语言切换按钮
+
+## 文件结构
+
+```
+src/
+├── i18n/
+│   ├── index.ts          # 国际化配置文件
+│   └── locales/
+│       ├── en.json       # 英文翻译
+│       └── zh.json       # 中文翻译
+├── components/
+│   └── LanguageSwitcher.tsx  # 语言切换组件
+└── main.tsx              # 导入国际化配置
+```
+
+## 默认语言设置
+
+- **默认语言**：英文 (en)
+- **回退语言**：英文 (en)
+
+## 使用方式
+
+1. 在组件中导入 `useTranslation`：
+   ```tsx
+   import { useTranslation } from 'react-i18next';
+
+   function MyComponent() {
+     const { t } = useTranslation();
+     return <div>{t('common.save')}</div>;
+   }
+   ```
+
+2. 切换语言：
+   ```tsx
+   const { i18n } = useTranslation();
+   i18n.changeLanguage('zh'); // 切换到中文
+   ```
+
+## 翻译键结构
+
+- `common.*` - 通用文案（保存、取消、设置等）
+- `header.*` - 头部相关文案
+- `provider.*` - 供应商相关文案
+- `notifications.*` - 通知消息
+- `settings.*` - 设置页面文案
+- `apps.*` - 应用名称
+- `console.*` - 控制台日志信息
+
+## 测试功能
+
+应用已添加了语言切换按钮（地球图标），点击可以在中英文之间切换，验证国际化功能是否正常工作。
+
+## 已更新的组件
+
+- ✅ App.tsx - 主应用组件
+- ✅ ConfirmDialog.tsx - 确认对话框
+- ✅ AddProviderModal.tsx - 添加供应商弹窗
+- ✅ EditProviderModal.tsx - 编辑供应商弹窗
+- ✅ ProviderList.tsx - 供应商列表
+- ✅ LanguageSwitcher.tsx - 语言切换器
+- 🔄 SettingsModal.tsx - 设置弹窗（部分完成）
+
+## 注意事项
+
+1. 所有新的文案都应该添加到翻译文件中，而不是硬编码
+2. 翻译键名应该有意义且结构化
+3. 可以通过修改 `src/i18n/index.ts` 中的 `lng` 配置来更改默认语言
diff --git a/package.json b/package.json
index edc4df1..ae5b4af 100644
--- a/package.json
+++ b/package.json
@@ -37,10 +37,12 @@
     "@tauri-apps/plugin-process": "^2.0.0",
     "@tauri-apps/plugin-updater": "^2.0.0",
     "codemirror": "^6.0.2",
+    "i18next": "^25.5.2",
     "jsonc-parser": "^3.2.1",
     "lucide-react": "^0.542.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
+    "react-i18next": "^16.0.0",
     "tailwindcss": "^4.1.13"
   }
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 3393607..7c2b881 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -41,6 +41,9 @@ importers:
       codemirror:
         specifier: ^6.0.2
         version: 6.0.2
+      i18next:
+        specifier: ^25.5.2
+        version: 25.5.2(typescript@5.9.2)
       jsonc-parser:
         specifier: ^3.2.1
         version: 3.3.1
@@ -53,6 +56,9 @@ importers:
       react-dom:
         specifier: ^18.2.0
         version: 18.3.1(react@18.3.1)
+      react-i18next:
+        specifier: ^16.0.0
+        version: 16.0.0(i18next@25.5.2(typescript@5.9.2))(react-dom@18.3.1(react@18.3.1))(react@18.3.1)(typescript@5.9.2)
       tailwindcss:
         specifier: ^4.1.13
         version: 4.1.13
@@ -159,6 +165,10 @@ packages:
     peerDependencies:
       '@babel/core': ^7.0.0-0
 
+  '@babel/runtime@7.28.4':
+    resolution: {integrity: sha512-Q/N6JNWvIvPnLDvjlE1OUBLPQHH6l3CltCEsHIujp45zQUSSh8K+gHnaEX45yAT1nyngnINhvWtzN+Nb9D8RAQ==}
+    engines: {node: '>=6.9.0'}
+
   '@babel/template@7.27.2':
     resolution: {integrity: sha512-LPDZ85aEJyYSd18/DkjNh4/y1ntkE5KwUHWTiqgRxruuZL2F1yuHligVHLvcHY2vMHXttKFpJn6LwfI7cw7ODw==}
     engines: {node: '>=6.9.0'}
@@ -750,6 +760,17 @@ packages:
   graceful-fs@4.2.11:
     resolution: {integrity: sha512-RbJ5/jmFcNNCcDV5o9eTnBLJ/HszWV0P73bc+Ff4nS/rJj+YaS6IGyiOL0VoBYX+l1Wrl3k63h/KrH+nhJ0XvQ==}
 
+  html-parse-stringify@3.0.1:
+    resolution: {integrity: sha512-KknJ50kTInJ7qIScF3jeaFRpMpE8/lfiTdzf/twXyPBLAGrLRTmkz3AdTnKeh40X8k9L2fdYwEp/42WGXIRGcg==}
+
+  i18next@25.5.2:
+    resolution: {integrity: sha512-lW8Zeh37i/o0zVr+NoCHfNnfvVw+M6FQbRp36ZZ/NyHDJ3NJVpp2HhAUyU9WafL5AssymNoOjMRB48mmx2P6Hw==}
+    peerDependencies:
+      typescript: ^5
+    peerDependenciesMeta:
+      typescript:
+        optional: true
+
   jiti@2.5.1:
     resolution: {integrity: sha512-twQoecYPiVA5K/h6SxtORw/Bs3ar+mLUtoPSc7iMXzQzK8d7eJ/R09wmTwAjiamETn1cXYPGfNnu7DMoHgu12w==}
     hasBin: true
@@ -890,6 +911,22 @@ packages:
     peerDependencies:
       react: ^18.3.1
 
+  react-i18next@16.0.0:
+    resolution: {integrity: sha512-JQ+dFfLnFSKJQt7W01lJHWRC0SX7eDPobI+MSTJ3/gP39xH2g33AuTE7iddAfXYHamJdAeMGM0VFboPaD3G68Q==}
+    peerDependencies:
+      i18next: '>= 25.5.2'
+      react: '>= 16.8.0'
+      react-dom: '*'
+      react-native: '*'
+      typescript: ^5
+    peerDependenciesMeta:
+      react-dom:
+        optional: true
+      react-native:
+        optional: true
+      typescript:
+        optional: true
+
   react-refresh@0.17.0:
     resolution: {integrity: sha512-z6F7K9bV85EfseRCp2bzrpyQ0Gkw1uLoCel9XBVWPg/TjRj94SkJzUTGfOa4bs7iJvBWtQG0Wq7wnI0syw3EBQ==}
     engines: {node: '>=0.10.0'}
@@ -973,6 +1010,10 @@ packages:
       terser:
         optional: true
 
+  void-elements@3.1.0:
+    resolution: {integrity: sha512-Dhxzh5HZuiHQhbvTW9AMetFfBHDMYpo23Uo9btPXgdYP+3T5S+p+jgNy7spra+veYhBP2dCSgxR/i2Y02h5/6w==}
+    engines: {node: '>=0.10.0'}
+
   w3c-keyname@2.2.8:
     resolution: {integrity: sha512-dpojBhNsCNN7T82Tm7k26A6G9ML3NkhDsnw9n/eoxSRlVBB4CEtIQ/KTCLI2Fwf3ataSXRhYFkQi3SlnFwPvPQ==}
 
@@ -1079,6 +1120,8 @@ snapshots:
       '@babel/core': 7.28.0
       '@babel/helper-plugin-utils': 7.27.1
 
+  '@babel/runtime@7.28.4': {}
+
   '@babel/template@7.27.2':
     dependencies:
       '@babel/code-frame': 7.27.1
@@ -1591,6 +1634,16 @@ snapshots:
 
   graceful-fs@4.2.11: {}
 
+  html-parse-stringify@3.0.1:
+    dependencies:
+      void-elements: 3.1.0
+
+  i18next@25.5.2(typescript@5.9.2):
+    dependencies:
+      '@babel/runtime': 7.28.4
+    optionalDependencies:
+      typescript: 5.9.2
+
   jiti@2.5.1: {}
 
   js-tokens@4.0.0: {}
@@ -1692,6 +1745,16 @@ snapshots:
       react: 18.3.1
       scheduler: 0.23.2
 
+  react-i18next@16.0.0(i18next@25.5.2(typescript@5.9.2))(react-dom@18.3.1(react@18.3.1))(react@18.3.1)(typescript@5.9.2):
+    dependencies:
+      '@babel/runtime': 7.28.4
+      html-parse-stringify: 3.0.1
+      i18next: 25.5.2(typescript@5.9.2)
+      react: 18.3.1
+    optionalDependencies:
+      react-dom: 18.3.1(react@18.3.1)
+      typescript: 5.9.2
+
   react-refresh@0.17.0: {}
 
   react@18.3.1:
@@ -1767,6 +1830,8 @@ snapshots:
       fsevents: 2.3.3
       lightningcss: 1.30.1
 
+  void-elements@3.1.0: {}
+
   w3c-keyname@2.2.8: {}
 
   yallist@3.1.1: {}
diff --git a/src/App.tsx b/src/App.tsx
index 3fd7737..f709f3d 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,4 +1,5 @@
 import { useState, useEffect, useRef } from "react";
+import { useTranslation } from "react-i18next";
 import { Provider } from "./types";
 import { AppType } from "./lib/tauri-api";
 import ProviderList from "./components/ProviderList";
@@ -8,6 +9,7 @@ import { ConfirmDialog } from "./components/ConfirmDialog";
 import { AppSwitcher } from "./components/AppSwitcher";
 import SettingsModal from "./components/SettingsModal";
 import { UpdateBadge } from "./components/UpdateBadge";
+import LanguageSwitcher from "./components/LanguageSwitcher";
 import { Plus, Settings, Moon, Sun } from "lucide-react";
 import { buttonStyles } from "./lib/styles";
 import { useDarkMode } from "./hooks/useDarkMode";
@@ -17,6 +19,7 @@ import { getCodexBaseUrl } from "./utils/providerConfigUtils";
 import { useVSCodeAutoSync } from "./hooks/useVSCodeAutoSync";
 
 function App() {
+  const { t } = useTranslation();
   const { isDarkMode, toggleDarkMode } = useDarkMode();
   const { isAutoSyncEnabled } = useVSCodeAutoSync();
   const [activeApp, setActiveApp] = useState<AppType>("claude");
@@ -24,7 +27,7 @@ function App() {
   const [currentProviderId, setCurrentProviderId] = useState<string>("");
   const [isAddModalOpen, setIsAddModalOpen] = useState(false);
   const [editingProviderId, setEditingProviderId] = useState<string | null>(
-    null,
+    null
   );
   const [notification, setNotification] = useState<{
     message: string;
@@ -44,7 +47,7 @@ function App() {
   const showNotification = (
     message: string,
     type: "success" | "error",
-    duration = 3000,
+    duration = 3000
   ) => {
     // 清除之前的定时器
     if (timeoutRef.current) {
@@ -88,7 +91,7 @@ function App() {
       try {
         unlisten = await window.api.onProviderSwitched(async (data) => {
           if (import.meta.env.DEV) {
-            console.log("收到供应商切换事件:", data);
+            console.log(t("console.providerSwitchReceived"), data);
           }
 
           // 如果当前应用类型匹配，则重新加载数据
@@ -102,7 +105,7 @@ function App() {
           }
         });
       } catch (error) {
-        console.error("设置供应商切换监听器失败:", error);
+        console.error(t("console.setupListenerFailed"), error);
       }
     };
 
@@ -152,16 +155,16 @@ function App() {
       await loadProviders();
       setEditingProviderId(null);
       // 显示编辑成功提示
-      showNotification("供应商配置已保存", "success", 2000);
+      showNotification(t("notifications.providerSaved"), "success", 2000);
       // 更新托盘菜单
       await window.api.updateTrayMenu();
     } catch (error) {
-      console.error("更新供应商失败:", error);
+      console.error(t("console.updateProviderFailed"), error);
       setEditingProviderId(null);
       const errorMessage = extractErrorMessage(error);
       const message = errorMessage
-        ? `保存失败：${errorMessage}`
-        : "保存失败，请重试";
+        ? t("notifications.saveFailed", { error: errorMessage })
+        : t("notifications.saveFailedGeneric");
       showNotification(message, "error", errorMessage ? 6000 : 3000);
     }
   };
@@ -170,13 +173,13 @@ function App() {
     const provider = providers[id];
     setConfirmDialog({
       isOpen: true,
-      title: "删除供应商",
-      message: `确定要删除供应商 "${provider?.name}" 吗？此操作无法撤销。`,
+      title: t("confirm.deleteProvider"),
+      message: t("confirm.deleteProviderMessage", { name: provider?.name }),
       onConfirm: async () => {
         await window.api.deleteProvider(id, activeApp);
         await loadProviders();
         setConfirmDialog(null);
-        showNotification("供应商删除成功", "success");
+        showNotification(t("notifications.providerDeleted"), "success");
         // 更新托盘菜单
         await window.api.updateTrayMenu();
       },
@@ -190,9 +193,9 @@ function App() {
       if (!status.exists) {
         if (!silent) {
           showNotification(
-            "未找到 VS Code 用户设置文件 (settings.json)",
+            t("notifications.vscodeSettingsNotFound"),
             "error",
-            3000,
+            3000
           );
         }
         return;
@@ -208,11 +211,7 @@ function App() {
         const parsed = getCodexBaseUrl(provider);
         if (!parsed) {
           if (!silent) {
-            showNotification(
-              "当前配置缺少 base_url，无法写入 VS Code",
-              "error",
-              4000,
-            );
+            showNotification(t("notifications.missingBaseUrl"), "error", 4000);
           }
           return;
         }
@@ -226,16 +225,17 @@ function App() {
       if (updatedSettings !== raw) {
         await window.api.writeVSCodeSettings(updatedSettings);
         if (!silent) {
-          showNotification("已同步到 VS Code", "success", 1500);
+          showNotification(t("notifications.syncedToVSCode"), "success", 1500);
         }
       }
 
       // 触发providers重新加载，以更新VS Code按钮状态
       await loadProviders();
     } catch (error: any) {
-      console.error("同步到VS Code失败:", error);
+      console.error(t("console.syncToVSCodeFailed"), error);
       if (!silent) {
-        const errorMessage = error?.message || "同步 VS Code 失败";
+        const errorMessage =
+          error?.message || t("notifications.syncVSCodeFailed");
         showNotification(errorMessage, "error", 5000);
       }
     }
@@ -246,11 +246,11 @@ function App() {
     if (success) {
       setCurrentProviderId(id);
       // 显示重启提示
-      const appName = activeApp === "claude" ? "Claude Code" : "Codex";
+      const appName = t(`apps.${activeApp}`);
       showNotification(
-        `切换成功！请重启 ${appName} 终端以生效`,
+        t("notifications.switchSuccess", { appName }),
         "success",
-        2000,
+        2000
       );
       // 更新托盘菜单
       await window.api.updateTrayMenu();
@@ -260,7 +260,7 @@ function App() {
         await syncCodexToVSCode(id, true); // silent模式，不显示通知
       }
     } else {
-      showNotification("切换失败，请检查配置", "error");
+      showNotification(t("notifications.switchFailed"), "error");
     }
   };
 
@@ -271,13 +271,13 @@ function App() {
 
       if (result.success) {
         await loadProviders();
-        showNotification("已从现有配置创建默认供应商", "success", 3000);
+        showNotification(t("notifications.autoImported"), "success", 3000);
         // 更新托盘菜单
         await window.api.updateTrayMenu();
       }
       // 如果导入失败（比如没有现有配置），静默处理，不显示错误
     } catch (error) {
-      console.error("自动导入默认配置失败:", error);
+      console.error(t("console.autoImportFailed"), error);
       // 静默处理，不影响用户体验
     }
   };
@@ -293,22 +293,27 @@ function App() {
               target="_blank"
               rel="noopener noreferrer"
               className="text-xl font-semibold text-blue-500 dark:text-blue-400 hover:text-blue-600 dark:hover:text-blue-300 transition-colors"
-              title="在 GitHub 上查看"
+              title={t("header.viewOnGithub")}
             >
               CC Switch
             </a>
             <button
               onClick={toggleDarkMode}
               className={buttonStyles.icon}
-              title={isDarkMode ? "切换到亮色模式" : "切换到暗色模式"}
+              title={
+                isDarkMode
+                  ? t("header.toggleLightMode")
+                  : t("header.toggleDarkMode")
+              }
             >
               {isDarkMode ? <Sun size={18} /> : <Moon size={18} />}
             </button>
+            <LanguageSwitcher />
             <div className="flex items-center gap-2">
               <button
                 onClick={() => setIsSettingsOpen(true)}
                 className={buttonStyles.icon}
-                title="设置"
+                title={t("common.settings")}
               >
                 <Settings size={18} />
               </button>
@@ -324,7 +329,7 @@ function App() {
               className={`inline-flex items-center gap-2 ${buttonStyles.primary}`}
             >
               <Plus size={16} />
-              添加供应商
+              {t("header.addProvider")}
             </button>
           </div>
         </div>
diff --git a/src/components/AddProviderModal.tsx b/src/components/AddProviderModal.tsx
index 17bebb1..8d92753 100644
--- a/src/components/AddProviderModal.tsx
+++ b/src/components/AddProviderModal.tsx
@@ -1,4 +1,5 @@
 import React from "react";
+import { useTranslation } from "react-i18next";
 import { Provider } from "../types";
 import { AppType } from "../lib/tauri-api";
 import ProviderForm from "./ProviderForm";
@@ -14,11 +15,13 @@ const AddProviderModal: React.FC<AddProviderModalProps> = ({
   onAdd,
   onClose,
 }) => {
+  const { t } = useTranslation();
+
   return (
     <ProviderForm
       appType={appType}
-      title="添加新供应商"
-      submitText="添加"
+      title={t("provider.addNewProvider")}
+      submitText={t("common.add")}
       showPresets={true}
       onSubmit={onAdd}
       onClose={onClose}
diff --git a/src/components/ConfirmDialog.tsx b/src/components/ConfirmDialog.tsx
index 7a1306d..e7eac9a 100644
--- a/src/components/ConfirmDialog.tsx
+++ b/src/components/ConfirmDialog.tsx
@@ -1,4 +1,5 @@
 import React from "react";
+import { useTranslation } from "react-i18next";
 import { AlertTriangle, X } from "lucide-react";
 import { isLinux } from "../lib/platform";
 
@@ -16,11 +17,13 @@ export const ConfirmDialog: React.FC<ConfirmDialogProps> = ({
   isOpen,
   title,
   message,
-  confirmText = "确定",
-  cancelText = "取消",
+  confirmText,
+  cancelText,
   onConfirm,
   onCancel,
 }) => {
+  const { t } = useTranslation();
+
   if (!isOpen) return null;
 
   return (
@@ -65,13 +68,13 @@ export const ConfirmDialog: React.FC<ConfirmDialogProps> = ({
             className="px-4 py-2 text-sm font-medium text-gray-500 hover:text-gray-900 hover:bg-white dark:text-gray-400 dark:hover:text-gray-100 dark:hover:bg-gray-800 rounded-md transition-colors"
             autoFocus
           >
-            {cancelText}
+            {cancelText || t("common.cancel")}
           </button>
           <button
             onClick={onConfirm}
             className="px-4 py-2 text-sm font-medium bg-red-500 text-white hover:bg-red-500/90 rounded-md transition-colors"
           >
-            {confirmText}
+            {confirmText || t("common.confirm")}
           </button>
         </div>
       </div>
diff --git a/src/components/EditProviderModal.tsx b/src/components/EditProviderModal.tsx
index 5c3d4ef..3844443 100644
--- a/src/components/EditProviderModal.tsx
+++ b/src/components/EditProviderModal.tsx
@@ -1,4 +1,5 @@
 import React from "react";
+import { useTranslation } from "react-i18next";
 import { Provider } from "../types";
 import { AppType } from "../lib/tauri-api";
 import ProviderForm from "./ProviderForm";
@@ -16,6 +17,8 @@ const EditProviderModal: React.FC<EditProviderModalProps> = ({
   onSave,
   onClose,
 }) => {
+  const { t } = useTranslation();
+
   const handleSubmit = (data: Omit<Provider, "id">) => {
     onSave({
       ...provider,
@@ -26,8 +29,8 @@ const EditProviderModal: React.FC<EditProviderModalProps> = ({
   return (
     <ProviderForm
       appType={appType}
-      title="编辑供应商"
-      submitText="保存"
+      title={t("common.edit")}
+      submitText={t("common.save")}
       initialData={provider}
       showPresets={false}
       onSubmit={handleSubmit}
diff --git a/src/components/LanguageSwitcher.tsx b/src/components/LanguageSwitcher.tsx
new file mode 100644
index 0000000..d8691f5
--- /dev/null
+++ b/src/components/LanguageSwitcher.tsx
@@ -0,0 +1,25 @@
+import React from "react";
+import { useTranslation } from "react-i18next";
+import { Globe } from "lucide-react";
+import { buttonStyles } from "../lib/styles";
+
+const LanguageSwitcher: React.FC = () => {
+  const { i18n } = useTranslation();
+
+  const toggleLanguage = () => {
+    const newLang = i18n.language === "en" ? "zh" : "en";
+    i18n.changeLanguage(newLang);
+  };
+
+  return (
+    <button
+      onClick={toggleLanguage}
+      className={buttonStyles.icon}
+      title={i18n.language === "en" ? "切换到中文" : "Switch to English"}
+    >
+      <Globe size={18} />
+    </button>
+  );
+};
+
+export default LanguageSwitcher;
diff --git a/src/components/ProviderList.tsx b/src/components/ProviderList.tsx
index 785e7f1..fd725b0 100644
--- a/src/components/ProviderList.tsx
+++ b/src/components/ProviderList.tsx
@@ -1,4 +1,5 @@
 import React, { useEffect, useState } from "react";
+import { useTranslation } from "react-i18next";
 import { Provider } from "../types";
 import { Play, Edit3, Trash2, CheckCircle2, Users } from "lucide-react";
 import { buttonStyles, cardStyles, badgeStyles, cn } from "../lib/styles";
@@ -35,6 +36,7 @@ const ProviderList: React.FC<ProviderListProps> = ({
   appType,
   onNotify,
 }) => {
+  const { t } = useTranslation();
   // 提取API地址（兼容不同供应商配置：Claude env / Codex TOML）
   const getApiUrl = (provider: Provider): string => {
     try {
@@ -49,9 +51,9 @@ const ProviderList: React.FC<ProviderListProps> = ({
         const match = cfg.config.match(/base_url\s*=\s*(['"])([^'\"]+)\1/);
         if (match && match[2]) return match[2];
       }
-      return "未配置官网地址";
+      return t("provider.notConfigured");
     } catch {
-      return "配置错误";
+      return t("provider.configError");
     }
   };
 
@@ -59,7 +61,7 @@ const ProviderList: React.FC<ProviderListProps> = ({
     try {
       await window.api.openExternal(url);
     } catch (error) {
-      console.error("打开链接失败:", error);
+      console.error(t("console.openLinkFailed"), error);
     }
   };
 
@@ -106,11 +108,7 @@ const ProviderList: React.FC<ProviderListProps> = ({
     try {
       const status = await window.api.getVSCodeSettingsStatus();
       if (!status.exists) {
-        onNotify?.(
-          "未找到 VS Code 用户设置文件 (settings.json)",
-          "error",
-          3000
-        );
+        onNotify?.(t("notifications.vscodeSettingsNotFound"), "error", 3000);
         return;
       }
 
@@ -121,7 +119,7 @@ const ProviderList: React.FC<ProviderListProps> = ({
       if (!isOfficial) {
         const parsed = getCodexBaseUrl(provider);
         if (!parsed) {
-          onNotify?.("当前配置缺少 base_url，无法写入 VS Code", "error", 4000);
+          onNotify?.(t("notifications.missingBaseUrl"), "error", 4000);
           return;
         }
       }
@@ -131,7 +129,7 @@ const ProviderList: React.FC<ProviderListProps> = ({
 
       if (next === raw) {
         // 幂等：没有变化也提示成功
-        onNotify?.("已应用到 VS Code，重启 Codex 插件以生效", "success", 3000);
+        onNotify?.(t("notifications.appliedToVSCode"), "success", 3000);
         setVscodeAppliedFor(provider.id);
         // 用户手动应用时，启用自动同步
         enableAutoSync();
@@ -139,13 +137,14 @@ const ProviderList: React.FC<ProviderListProps> = ({
       }
 
       await window.api.writeVSCodeSettings(next);
-      onNotify?.("已应用到 VS Code，重启 Codex 插件以生效", "success", 3000);
+      onNotify?.(t("notifications.appliedToVSCode"), "success", 3000);
       setVscodeAppliedFor(provider.id);
       // 用户手动应用时，启用自动同步
       enableAutoSync();
     } catch (e: any) {
       console.error(e);
-      const msg = e && e.message ? e.message : "应用到 VS Code 失败";
+      const msg =
+        e && e.message ? e.message : t("notifications.syncVSCodeFailed");
       onNotify?.(msg, "error", 5000);
     }
   };
@@ -154,11 +153,7 @@ const ProviderList: React.FC<ProviderListProps> = ({
     try {
       const status = await window.api.getVSCodeSettingsStatus();
       if (!status.exists) {
-        onNotify?.(
-          "未找到 VS Code 用户设置文件 (settings.json)",
-          "error",
-          3000
-        );
+        onNotify?.(t("notifications.vscodeSettingsNotFound"), "error", 3000);
         return;
       }
       const raw = await window.api.readVSCodeSettings();
@@ -167,20 +162,21 @@ const ProviderList: React.FC<ProviderListProps> = ({
         isOfficial: true,
       });
       if (next === raw) {
-        onNotify?.("已从 VS Code 移除，重启 Codex 插件以生效", "success", 3000);
+        onNotify?.(t("notifications.removedFromVSCode"), "success", 3000);
         setVscodeAppliedFor(null);
         // 用户手动移除时，禁用自动同步
         disableAutoSync();
         return;
       }
       await window.api.writeVSCodeSettings(next);
-      onNotify?.("已从 VS Code 移除，重启 Codex 插件以生效", "success", 3000);
+      onNotify?.(t("notifications.removedFromVSCode"), "success", 3000);
       setVscodeAppliedFor(null);
       // 用户手动移除时，禁用自动同步
       disableAutoSync();
     } catch (e: any) {
       console.error(e);
-      const msg = e && e.message ? e.message : "移除失败";
+      const msg =
+        e && e.message ? e.message : t("notifications.syncVSCodeFailed");
       onNotify?.(msg, "error", 5000);
     }
   };
@@ -214,10 +210,10 @@ const ProviderList: React.FC<ProviderListProps> = ({
             <Users size={24} className="text-gray-400" />
           </div>
           <h3 className="text-lg font-medium text-gray-900 dark:text-gray-100 mb-2">
-            还没有添加任何供应商
+            {t("provider.noProviders")}
           </h3>
           <p className="text-gray-500 dark:text-gray-400 text-sm">
-            点击右上角的"添加供应商"按钮开始配置您的第一个API供应商
+            {t("provider.noProvidersDescription")}
           </p>
         </div>
       ) : (
@@ -247,7 +243,7 @@ const ProviderList: React.FC<ProviderListProps> = ({
                         )}
                       >
                         <CheckCircle2 size={12} />
-                        当前使用
+                        {t("provider.currentlyUsing")}
                       </div>
                     </div>
 
@@ -292,13 +288,13 @@ const ProviderList: React.FC<ProviderListProps> = ({
                           )}
                           title={
                             vscodeAppliedFor === provider.id
-                              ? "从 VS Code 移除我们写入的配置"
-                              : "将当前供应商应用到 VS Code"
+                              ? t("provider.removeFromVSCode")
+                              : t("provider.applyToVSCode")
                           }
                         >
                           {vscodeAppliedFor === provider.id
-                            ? "从 VS Code 移除"
-                            : "应用到 VS Code"}
+                            ? t("provider.removeFromVSCode")
+                            : t("provider.applyToVSCode")}
                         </button>
                       )}
                     <button
@@ -312,13 +308,13 @@ const ProviderList: React.FC<ProviderListProps> = ({
                       )}
                     >
                       {!isCurrent && <Play size={14} />}
-                      {isCurrent ? "使用中" : "启用"}
+                      {isCurrent ? t("provider.inUse") : t("provider.enable")}
                     </button>
 
                     <button
                       onClick={() => onEdit(provider.id)}
                       className={buttonStyles.icon}
-                      title="编辑供应商"
+                      title={t("provider.editProvider")}
                     >
                       <Edit3 size={16} />
                     </button>
@@ -332,7 +328,7 @@ const ProviderList: React.FC<ProviderListProps> = ({
                           ? "text-gray-400 cursor-not-allowed"
                           : "text-gray-500 hover:text-red-500 hover:bg-red-100 dark:text-gray-400 dark:hover:text-red-400 dark:hover:bg-red-500/10"
                       )}
-                      title="删除供应商"
+                      title={t("provider.deleteProvider")}
                     >
                       <Trash2 size={16} />
                     </button>
diff --git a/src/components/SettingsModal.tsx b/src/components/SettingsModal.tsx
index 87c06a8..54be860 100644
--- a/src/components/SettingsModal.tsx
+++ b/src/components/SettingsModal.tsx
@@ -1,4 +1,5 @@
 import { useState, useEffect } from "react";
+import { useTranslation } from "react-i18next";
 import {
   X,
   RefreshCw,
@@ -24,6 +25,7 @@ interface SettingsModalProps {
 }
 
 export default function SettingsModal({ onClose }: SettingsModalProps) {
+  const { t } = useTranslation();
   const [settings, setSettings] = useState<Settings>({
     showInTray: true,
     minimizeToTrayOnClose: true,
@@ -54,9 +56,9 @@ export default function SettingsModal({ onClose }: SettingsModalProps) {
       const appVersion = await getVersion();
       setVersion(appVersion);
     } catch (error) {
-      console.error("获取版本信息失败:", error);
+      console.error(t("console.getVersionFailed"), error);
       // 失败时不硬编码版本号，显示为未知
-      setVersion("未知");
+      setVersion(t("common.unknown"));
     }
   };
 
@@ -300,7 +302,7 @@ export default function SettingsModal({ onClose }: SettingsModalProps) {
         {/* 标题栏 */}
         <div className="flex items-center justify-between px-6 py-4 border-b border-gray-200 dark:border-gray-800">
           <h2 className="text-lg font-semibold text-blue-500 dark:text-blue-400">
-            设置
+            {t("settings.title")}
           </h2>
           <button
             onClick={onClose}
@@ -315,16 +317,16 @@ export default function SettingsModal({ onClose }: SettingsModalProps) {
           {/* 窗口行为设置 */}
           <div>
             <h3 className="text-sm font-medium text-gray-900 dark:text-gray-100 mb-3">
-              窗口行为
+              {t("settings.windowBehavior")}
             </h3>
             <div className="space-y-3">
               <label className="flex items-center justify-between">
                 <div>
                   <span className="text-sm text-gray-900 dark:text-gray-100">
-                    关闭时最小化到托盘
+                    {t("settings.minimizeToTray")}
                   </span>
                   <p className="text-xs text-gray-500 dark:text-gray-400 mt-1">
-                    勾选后点击关闭按钮会隐藏到系统托盘，取消则直接退出应用。
+                    {t("settings.minimizeToTrayDescription")}
                   </p>
                 </div>
                 <input
@@ -347,18 +349,18 @@ export default function SettingsModal({ onClose }: SettingsModalProps) {
           {/* 配置文件位置 */}
           <div>
             <h3 className="text-sm font-medium text-gray-900 dark:text-gray-100 mb-3">
-              配置文件位置
+              {t("settings.configFileLocation")}
             </h3>
             <div className="flex items-center gap-2">
               <div className="flex-1 px-3 py-2 bg-gray-100 dark:bg-gray-800 rounded-lg">
                 <span className="text-xs font-mono text-gray-500 dark:text-gray-400">
-                  {configPath || "加载中..."}
+                  {configPath || t("common.loading")}
                 </span>
               </div>
               <button
                 onClick={handleOpenConfigFolder}
                 className="p-2 hover:bg-gray-100 dark:hover:bg-gray-800 rounded-lg transition-colors"
-                title="打开文件夹"
+                title={t("settings.openFolder")}
               >
                 <FolderOpen
                   size={18}
@@ -371,16 +373,15 @@ export default function SettingsModal({ onClose }: SettingsModalProps) {
           {/* 配置目录覆盖 */}
           <div>
             <h3 className="text-sm font-medium text-gray-900 dark:text-gray-100 mb-2">
-              配置目录覆盖（高级）
+              {t("settings.configDirectoryOverride")}
             </h3>
             <p className="text-xs text-gray-500 dark:text-gray-400 mb-3 leading-relaxed">
-              在 WSL 等环境使用 Claude Code 或 Codex 的时候，可手动指定 WSL
-              里的配置目录，供应商数据与主环境保持一致。
+              {t("settings.configDirectoryDescription")}
             </p>
             <div className="space-y-3">
               <div>
                 <label className="block text-xs font-medium text-gray-500 dark:text-gray-400 mb-1">
-                  Claude Code 配置目录
+                  {t("settings.claudeConfigDir")}
                 </label>
                 <div className="flex gap-2">
                   <input
diff --git a/src/i18n/index.ts b/src/i18n/index.ts
new file mode 100644
index 0000000..8c7d3e2
--- /dev/null
+++ b/src/i18n/index.ts
@@ -0,0 +1,29 @@
+import i18n from "i18next";
+import { initReactI18next } from "react-i18next";
+
+import en from "./locales/en.json";
+import zh from "./locales/zh.json";
+
+const resources = {
+  en: {
+    translation: en,
+  },
+  zh: {
+    translation: zh,
+  },
+};
+
+i18n.use(initReactI18next).init({
+  resources,
+  lng: "en", // 默认语言设置为英文
+  fallbackLng: "en", // 回退语言也设置为英文
+
+  interpolation: {
+    escapeValue: false, // React 已经默认转义
+  },
+
+  // 开发模式下显示调试信息
+  debug: false,
+});
+
+export default i18n;
diff --git a/src/i18n/locales/en.json b/src/i18n/locales/en.json
new file mode 100644
index 0000000..5109b51
--- /dev/null
+++ b/src/i18n/locales/en.json
@@ -0,0 +1,109 @@
+{
+  "app": {
+    "title": "CC Switch",
+    "description": "Claude Code & Codex Provider Switching Tool"
+  },
+  "common": {
+    "add": "Add",
+    "edit": "Edit",
+    "delete": "Delete",
+    "save": "Save",
+    "cancel": "Cancel",
+    "confirm": "Confirm",
+    "close": "Close",
+    "settings": "Settings",
+    "about": "About",
+    "version": "Version",
+    "loading": "Loading...",
+    "success": "Success",
+    "error": "Error",
+    "unknown": "Unknown"
+  },
+  "header": {
+    "viewOnGithub": "View on GitHub",
+    "toggleDarkMode": "Switch to Dark Mode",
+    "toggleLightMode": "Switch to Light Mode",
+    "addProvider": "Add Provider"
+  },
+  "provider": {
+    "noProviders": "No providers added yet",
+    "noProvidersDescription": "Click the \"Add Provider\" button in the top right to configure your first API provider",
+    "currentlyUsing": "Currently Using",
+    "enable": "Enable",
+    "inUse": "In Use",
+    "editProvider": "Edit Provider",
+    "deleteProvider": "Delete Provider",
+    "addNewProvider": "Add New Provider",
+    "configError": "Configuration Error",
+    "notConfigured": "Not configured for official website",
+    "applyToVSCode": "Apply to VS Code",
+    "removeFromVSCode": "Remove from VS Code"
+  },
+  "notifications": {
+    "providerSaved": "Provider configuration saved",
+    "providerDeleted": "Provider deleted successfully",
+    "switchSuccess": "Switch successful! Please restart {{appName}} terminal to take effect",
+    "switchFailed": "Switch failed, please check configuration",
+    "autoImported": "Default provider created from existing configuration",
+    "appliedToVSCode": "Applied to VS Code, restart Codex plugin to take effect",
+    "removedFromVSCode": "Removed from VS Code, restart Codex plugin to take effect",
+    "syncedToVSCode": "Synced to VS Code",
+    "vscodeSettingsNotFound": "VS Code user settings file (settings.json) not found",
+    "missingBaseUrl": "Current configuration missing base_url, cannot write to VS Code",
+    "saveFailed": "Save failed: {{error}}",
+    "saveFailedGeneric": "Save failed, please try again",
+    "syncVSCodeFailed": "Sync to VS Code failed"
+  },
+  "confirm": {
+    "deleteProvider": "Delete Provider",
+    "deleteProviderMessage": "Are you sure you want to delete provider \"{{name}}\"? This action cannot be undone."
+  },
+  "settings": {
+    "title": "Settings",
+    "windowBehavior": "Window Behavior",
+    "minimizeToTray": "Minimize to tray on close",
+    "minimizeToTrayDescription": "When checked, clicking the close button will hide to system tray, otherwise the app will exit directly.",
+    "configFileLocation": "Configuration File Location",
+    "openFolder": "Open Folder",
+    "configDirectoryOverride": "Configuration Directory Override (Advanced)",
+    "configDirectoryDescription": "When using Claude Code or Codex in environments like WSL, you can manually specify the configuration directory in WSL to keep provider data consistent with the main environment.",
+    "claudeConfigDir": "Claude Code Configuration Directory",
+    "codexConfigDir": "Codex Configuration Directory",
+    "browsePlaceholderClaude": "e.g., /home/<your-username>/.claude",
+    "browsePlaceholderCodex": "e.g., /home/<your-username>/.codex",
+    "browseDirectory": "Browse Directory",
+    "resetDefault": "Reset to default directory (takes effect after saving)",
+    "checkForUpdates": "Check for Updates",
+    "updateTo": "Update to v{{version}}",
+    "updating": "Updating...",
+    "checking": "Checking...",
+    "upToDate": "Up to Date",
+    "releaseNotes": "Release Notes",
+    "viewReleaseNotes": "View release notes for this version",
+    "viewCurrentReleaseNotes": "View current version release notes"
+  },
+  "apps": {
+    "claude": "Claude Code",
+    "codex": "Codex"
+  },
+  "console": {
+    "providerSwitchReceived": "Received provider switch event:",
+    "setupListenerFailed": "Failed to setup provider switch listener:",
+    "updateProviderFailed": "Update provider failed:",
+    "syncToVSCodeFailed": "Sync to VS Code failed:",
+    "autoImportFailed": "Auto import default configuration failed:",
+    "openLinkFailed": "Failed to open link:",
+    "getVersionFailed": "Failed to get version info:",
+    "loadSettingsFailed": "Failed to load settings:",
+    "getConfigPathFailed": "Failed to get config path:",
+    "getConfigDirFailed": "Failed to get config directory:",
+    "detectPortableFailed": "Failed to detect portable mode:",
+    "saveSettingsFailed": "Failed to save settings:",
+    "updateFailed": "Update failed:",
+    "checkUpdateFailed": "Check for updates failed:",
+    "openConfigFolderFailed": "Failed to open config folder:",
+    "selectConfigDirFailed": "Failed to select config directory:",
+    "getDefaultConfigDirFailed": "Failed to get default config directory:",
+    "openReleaseNotesFailed": "Failed to open release notes:"
+  }
+}
diff --git a/src/i18n/locales/zh.json b/src/i18n/locales/zh.json
new file mode 100644
index 0000000..81e80e4
--- /dev/null
+++ b/src/i18n/locales/zh.json
@@ -0,0 +1,109 @@
+{
+  "app": {
+    "title": "CC Switch",
+    "description": "Claude Code & Codex 供应商切换工具"
+  },
+  "common": {
+    "add": "添加",
+    "edit": "编辑",
+    "delete": "删除",
+    "save": "保存",
+    "cancel": "取消",
+    "confirm": "确定",
+    "close": "关闭",
+    "settings": "设置",
+    "about": "关于",
+    "version": "版本",
+    "loading": "加载中...",
+    "success": "成功",
+    "error": "错误",
+    "unknown": "未知"
+  },
+  "header": {
+    "viewOnGithub": "在 GitHub 上查看",
+    "toggleDarkMode": "切换到暗色模式",
+    "toggleLightMode": "切换到亮色模式",
+    "addProvider": "添加供应商"
+  },
+  "provider": {
+    "noProviders": "还没有添加任何供应商",
+    "noProvidersDescription": "点击右上角的\"添加供应商\"按钮开始配置您的第一个API供应商",
+    "currentlyUsing": "当前使用",
+    "enable": "启用",
+    "inUse": "使用中",
+    "editProvider": "编辑供应商",
+    "deleteProvider": "删除供应商",
+    "addNewProvider": "添加新供应商",
+    "configError": "配置错误",
+    "notConfigured": "未配置官网地址",
+    "applyToVSCode": "应用到 VS Code",
+    "removeFromVSCode": "从 VS Code 移除"
+  },
+  "notifications": {
+    "providerSaved": "供应商配置已保存",
+    "providerDeleted": "供应商删除成功",
+    "switchSuccess": "切换成功！请重启 {{appName}} 终端以生效",
+    "switchFailed": "切换失败，请检查配置",
+    "autoImported": "已从现有配置创建默认供应商",
+    "appliedToVSCode": "已应用到 VS Code，重启 Codex 插件以生效",
+    "removedFromVSCode": "已从 VS Code 移除，重启 Codex 插件以生效",
+    "syncedToVSCode": "已同步到 VS Code",
+    "vscodeSettingsNotFound": "未找到 VS Code 用户设置文件 (settings.json)",
+    "missingBaseUrl": "当前配置缺少 base_url，无法写入 VS Code",
+    "saveFailed": "保存失败：{{error}}",
+    "saveFailedGeneric": "保存失败，请重试",
+    "syncVSCodeFailed": "同步 VS Code 失败"
+  },
+  "confirm": {
+    "deleteProvider": "删除供应商",
+    "deleteProviderMessage": "确定要删除供应商 \"{{name}}\" 吗？此操作无法撤销。"
+  },
+  "settings": {
+    "title": "设置",
+    "windowBehavior": "窗口行为",
+    "minimizeToTray": "关闭时最小化到托盘",
+    "minimizeToTrayDescription": "勾选后点击关闭按钮会隐藏到系统托盘，取消则直接退出应用。",
+    "configFileLocation": "配置文件位置",
+    "openFolder": "打开文件夹",
+    "configDirectoryOverride": "配置目录覆盖（高级）",
+    "configDirectoryDescription": "在 WSL 等环境使用 Claude Code 或 Codex 的时候，可手动指定 WSL 里的配置目录，供应商数据与主环境保持一致。",
+    "claudeConfigDir": "Claude Code 配置目录",
+    "codexConfigDir": "Codex 配置目录",
+    "browsePlaceholderClaude": "例如：/home/<你的用户名>/.claude",
+    "browsePlaceholderCodex": "例如：/home/<你的用户名>/.codex",
+    "browseDirectory": "浏览目录",
+    "resetDefault": "恢复默认目录（需保存后生效）",
+    "checkForUpdates": "检查更新",
+    "updateTo": "更新到 v{{version}}",
+    "updating": "更新中...",
+    "checking": "检查中...",
+    "upToDate": "已是最新",
+    "releaseNotes": "更新日志",
+    "viewReleaseNotes": "查看该版本更新日志",
+    "viewCurrentReleaseNotes": "查看当前版本更新日志"
+  },
+  "apps": {
+    "claude": "Claude Code",
+    "codex": "Codex"
+  },
+  "console": {
+    "providerSwitchReceived": "收到供应商切换事件:",
+    "setupListenerFailed": "设置供应商切换监听器失败:",
+    "updateProviderFailed": "更新供应商失败:",
+    "syncToVSCodeFailed": "同步到VS Code失败:",
+    "autoImportFailed": "自动导入默认配置失败:",
+    "openLinkFailed": "打开链接失败:",
+    "getVersionFailed": "获取版本信息失败:",
+    "loadSettingsFailed": "加载设置失败:",
+    "getConfigPathFailed": "获取配置路径失败:",
+    "getConfigDirFailed": "获取配置目录失败:",
+    "detectPortableFailed": "检测便携模式失败:",
+    "saveSettingsFailed": "保存设置失败:",
+    "updateFailed": "更新失败:",
+    "checkUpdateFailed": "检查更新失败:",
+    "openConfigFolderFailed": "打开配置文件夹失败:",
+    "selectConfigDirFailed": "选择配置目录失败:",
+    "getDefaultConfigDirFailed": "获取默认配置目录失败:",
+    "openReleaseNotesFailed": "打开更新日志失败:"
+  }
+}
diff --git a/src/main.tsx b/src/main.tsx
index 5d77b49..8bdc674 100644
--- a/src/main.tsx
+++ b/src/main.tsx
@@ -5,6 +5,8 @@ import { UpdateProvider } from "./contexts/UpdateContext";
 import "./index.css";
 // 导入 Tauri API（自动绑定到 window.api）
 import "./lib/tauri-api";
+// 导入国际化配置
+import "./i18n";
 
 // 根据平台添加 body class，便于平台特定样式
 try {
@@ -23,5 +25,5 @@ ReactDOM.createRoot(document.getElementById("root")!).render(
     <UpdateProvider>
       <App />
     </UpdateProvider>
-  </React.StrictMode>,
+  </React.StrictMode>
 );