diff --git a/src/i18n/index.tsx b/src/i18n/index.tsx
index a23d56c..f7d4b02 100644
--- a/src/i18n/index.tsx
+++ b/src/i18n/index.tsx
@@ -9,15 +9,20 @@ import en from './locales/en/translation.json';
 import es from './locales/es/translation.json';
 import ja from './locales/ja/translation.json';
 import ru from './locales/ru/translation.json';
-import zh from './locales/zh_CN/translation.json';
+import zh_CN from './locales/zh_CN/translation.json';
+import zh_TW from './locales/zh_TW/translation.json';
 
-export const locales = ['en', 'es', 'ja', 'ru', 'zh'] as const;
+export const locales = ['en', 'es', 'ja', 'ru', 'zh_CN', 'zh_TW'] as const;
 export type Locale = (typeof locales)[number];
-export const isLocale = (locale: string): locale is Locale => locales.includes(locale as Locale);
+
+export const isLocale = (locale: string): locale is Locale =>
+  locales.includes(locale as Locale) ||
+  (locale.startsWith('zh-') && (locales.includes('zh_CN' as Locale) || locales.includes('zh_TW' as Locale)));
 
 export const localeOptions: Array<Option<Locale>> = [
   { value: 'en', label: 'English' },
-  { value: 'zh', label: '中文' },
+  { value: 'zh_CN', label: '简体中文' },
+  { value: 'zh_TW', label: '正體中文' },
   { value: 'ru', label: 'Русский' },
   { value: 'ja', label: '日本語' },
   { value: 'es', label: 'Español' },
@@ -26,10 +31,18 @@ export const localeOptions: Array<Option<Locale>> = [
 export const getLocaleOption = (locale?: Locale) =>
   localeOptions.find((option) => option.value === locale) ?? localeOptions[0];
 
-const [browserConfigLocale] = Browser.i18n.getUILanguage().split('-');
-const defaultLocale = isLocale(browserConfigLocale) ? browserConfigLocale : 'en';
+const getDefaultLocale = (): Locale => {
+  const browserLocale = Browser.i18n.getUILanguage();
+  if (browserLocale.startsWith('zh-')) {
+    // For Chinese, we need to differentiate between Simplified and Traditional
+    return browserLocale.toLowerCase().includes('tw') || browserLocale.toLowerCase().includes('hk') ? 'zh_TW' : 'zh_CN';
+  }
+  return isLocale(browserLocale) ? (browserLocale as Locale) : 'en';
+};
+
+const defaultLocale = getDefaultLocale();
 
-const messagesMap = { en, es, ja, ru, zh } as const;
+const messagesMap = { en, es, ja, ru, zh_CN, zh_TW } as const;
 
 export const defaultTranslationValues: RichTranslationValues = {
   i: (children) => <span className="italic">{children}</span>,
diff --git a/src/i18n/locales/zh_TW/messages.json b/src/i18n/locales/zh_TW/messages.json
new file mode 100644
index 0000000..210ee9c
--- /dev/null
+++ b/src/i18n/locales/zh_TW/messages.json
@@ -0,0 +1,8 @@
+{
+  "description": {
+    "message": "Revoke.cash 瀏覽器擴充功能有助於保護您免受常見的加密詐騙。"
+  },
+  "name": {
+    "message": "Revoke.cash - web3 詐騙防護"
+  }
+}
diff --git a/src/i18n/locales/zh_TW/translation.json b/src/i18n/locales/zh_TW/translation.json
new file mode 100644
index 0000000..b7093c5
--- /dev/null
+++ b/src/i18n/locales/zh_TW/translation.json
@@ -0,0 +1,50 @@
+{
+  "common": {
+    "address": "地址",
+    "bypass": "注意：網站試圖繞過 Revoke.cash 確認視窗，謹慎行事。",
+    "continue": "繼續",
+    "dismiss": "取消",
+    "error_occurred": "嘗試建立 Revoke.cash 彈出視窗時發生錯誤。請在我們的 <discord-link>Discord</discord-link> 中聯絡我們。",
+    "reject": "拒絕",
+    "unknown_asset": "未知資產"
+  },
+  "confirm_allowance": {
+    "spender": "支出者",
+    "title": "授予代幣授權"
+  },
+  "confirm_hash": {
+    "explanation": "這可用於列出待售 NFT 或授權資產轉移。請確保您信任該網站。",
+    "hash": "雜湊",
+    "title": "簽署雜湊簽名"
+  },
+  "confirm_listing": {
+    "title": "簽署 NFT 市場列表"
+  },
+  "confirm_suspected_scam": {
+    "title": "與可疑的詐騙地址互動"
+  },
+  "popup": {
+    "about": {
+      "official_website": "官方網站",
+      "title": "關於",
+      "version": "版本"
+    },
+    "color_theme": {
+      "themes": {
+        "dark": "深色",
+        "light": "淺色",
+        "system": "系統"
+      },
+      "title": "主題顏色"
+    },
+    "language": {
+      "title": "語言"
+    },
+    "settings": {
+      "approvals": "代幣授權",
+      "hash_signatures": "雜湊簽名",
+      "listings": "NFT 市場列表",
+      "suspected_scams": "涉嫌詐騙"
+    }
+  }
+}