diff --git a/src/hooks/useI18n.ts b/src/hooks/useI18n.ts
index 8c315b6..47f65a5 100644
--- a/src/hooks/useI18n.ts
+++ b/src/hooks/useI18n.ts
@@ -2,13 +2,9 @@
  * i18n React Hook
  */
 
-import { useState, useEffect, useCallback } from 'react';
+import { useState, useCallback } from 'react';
 import { Language, languageNames } from '../i18n';
 import {
-  getCurrentLanguage,
-  setCurrentLanguage,
-  initLanguageFromStorage,
-  detectAndSetSystemLanguage,
   t,
   formatNumber,
   formatDate
@@ -34,48 +30,23 @@ export interface UseI18nReturn {
 }
 
 /**
- * i18n Hook
+ * i18n Hook - 固定为英语
  */
 export const useI18n = (): UseI18nReturn => {
-  const [currentLanguage, setCurrentLanguageState] = useState<Language>(getCurrentLanguage());
-  const [loading, setLoading] = useState(true);
+  const [currentLanguage] = useState<Language>('en-US');
+  const [loading] = useState(false); // 不需要加载，直接设为false
 
-  // 初始化语言设置
-  useEffect(() => {
-    const initLanguage = async () => {
-      try {
-        // 首先尝试从本地存储加载
-        await initLanguageFromStorage();
-
-        // 如果没有保存的语言，检测系统语言
-        const language = await detectAndSetSystemLanguage();
-        setCurrentLanguageState(language);
-      } catch (error) {
-        console.error('Failed to initialize language:', error);
-      } finally {
-        setLoading(false);
-      }
-    };
-
-    initLanguage();
-  }, []);
-
-  // 切换语言
-  const changeLanguage = useCallback(async (language: Language) => {
-    try {
-      await setCurrentLanguage(language);
-      setCurrentLanguageState(language);
-    } catch (error) {
-      console.error('Failed to change language:', error);
-      throw error;
-    }
+  // 切换语言 - 空实现，因为只支持英语
+  const changeLanguage = useCallback(async () => {
+    // 不执行任何操作，因为只支持英语
+    console.log('Language switching is disabled, only English is supported');
   }, []);
 
   return {
     currentLanguage,
     t,
     changeLanguage,
-    supportedLanguages: ['zh-CN', 'en-US', 'ja-JP', 'ko-KR'],
+    supportedLanguages: ['en-US'], // 只支持英语
     languageNames,
     formatNumber,
     formatDate,
diff --git a/src/i18n/index.ts b/src/i18n/index.ts
index 4ddb811..3cf7de3 100644
--- a/src/i18n/index.ts
+++ b/src/i18n/index.ts
@@ -13,9 +13,9 @@ export interface I18nConfig {
 }
 
 export const i18nConfig: I18nConfig = {
-  defaultLanguage: 'zh-CN',
-  fallbackLanguage: 'zh-CN',
-  supportedLanguages: ['zh-CN', 'en-US', 'ja-JP', 'ko-KR'],
+  defaultLanguage: 'en-US',
+  fallbackLanguage: 'en-US',
+  supportedLanguages: ['en-US'],
   storageKey: 'app_language',
 };
 
diff --git a/src/i18n/utils.ts b/src/i18n/utils.ts
index 480a215..ea3eb1f 100644
--- a/src/i18n/utils.ts
+++ b/src/i18n/utils.ts
@@ -6,8 +6,8 @@ import Taro from '@tarojs/taro';
 import { Language, i18nConfig } from './index';
 import { locales } from './locales';
 
-// 当前语言状态
-let currentLanguage: Language = i18nConfig.defaultLanguage;
+// 当前语言状态 - 固定为英语
+let currentLanguage: Language = 'en-US';
 
 /**
  * 获取当前语言
@@ -17,37 +17,26 @@ export const getCurrentLanguage = (): Language => {
 };
 
 /**
- * 设置当前语言
+ * 设置当前语言 - 固定为英语
  */
-export const setCurrentLanguage = async (language: Language): Promise<void> => {
-  if (!i18nConfig.supportedLanguages.includes(language)) {
-    console.warn(`Unsupported language: ${language}, fallback to ${i18nConfig.fallbackLanguage}`);
-    language = i18nConfig.fallbackLanguage;
-  }
-
-  currentLanguage = language;
+export const setCurrentLanguage = async (): Promise<void> => {
+  // 始终使用英语
+  currentLanguage = 'en-US';
 
   // 保存到本地存储
   try {
-    await Taro.setStorageSync(i18nConfig.storageKey, language);
+    await Taro.setStorageSync(i18nConfig.storageKey, 'en-US');
   } catch (error) {
     console.error('Failed to save language to storage:', error);
   }
 };
 
 /**
- * 从本地存储初始化语言
+ * 从本地存储初始化语言 - 固定为英语
  */
 export const initLanguageFromStorage = async (): Promise<Language> => {
-  try {
-    const savedLanguage = await Taro.getStorageSync(i18nConfig.storageKey);
-    if (savedLanguage && i18nConfig.supportedLanguages.includes(savedLanguage)) {
-      currentLanguage = savedLanguage;
-    }
-  } catch (error) {
-    console.error('Failed to load language from storage:', error);
-  }
-
+  // 始终返回英语，忽略本地存储
+  currentLanguage = 'en-US';
   return currentLanguage;
 };
 
@@ -95,73 +84,37 @@ export const t = (key: string, params?: Record<string, string | number>): string
 };
 
 /**
- * 检测系统语言并设置
+ * 检测系统语言并设置 - 固定为英语
  */
 export const detectAndSetSystemLanguage = async (): Promise<Language> => {
-  try {
-    const systemInfo = await Taro.getSystemInfo();
-    const systemLanguage = systemInfo.language;
-
-    // 映射系统语言到支持的语言
-    const languageMap: Record<string, Language> = {
-      'zh-CN': 'zh-CN',
-      'zh-Hans': 'zh-CN',
-      'zh': 'zh-CN',
-      'en-US': 'en-US',
-      'en': 'en-US',
-      'ja-JP': 'ja-JP',
-      'ja': 'ja-JP',
-      'ko-KR': 'ko-KR',
-      'ko': 'ko-KR',
-    };
-
-    const detectedLanguage = languageMap[systemLanguage] || i18nConfig.defaultLanguage;
-
-    // 如果本地存储中没有语言设置，使用检测到的语言
-    const savedLanguage = await Taro.getStorageSync(i18nConfig.storageKey);
-    if (!savedLanguage) {
-      await setCurrentLanguage(detectedLanguage);
-      return detectedLanguage;
-    }
-
-    return getCurrentLanguage();
-  } catch (error) {
-    console.error('Failed to detect system language:', error);
-    return i18nConfig.defaultLanguage;
-  }
+  // 始终返回英语，忽略系统语言检测
+  currentLanguage = 'en-US';
+  return 'en-US';
 };
 
 /**
- * 格式化数字（根据语言环境）
+ * 格式化数字（根据语言环境） - 固定为英语
  */
 export const formatNumber = (num: number): string => {
   try {
-    const locale = currentLanguage === 'zh-CN' ? 'zh-CN' :
-                  currentLanguage === 'ja-JP' ? 'ja-JP' :
-                  currentLanguage === 'ko-KR' ? 'ko-KR' : 'en-US';
-
-    return new Intl.NumberFormat(locale).format(num);
+    return new Intl.NumberFormat('en-US').format(num);
   } catch (error) {
     return num.toString();
   }
 };
 
 /**
- * 格式化日期（根据语言环境）
+ * 格式化日期（根据语言环境） - 固定为英语
  */
 export const formatDate = (date: Date, options?: Intl.DateTimeFormatOptions): string => {
   try {
-    const locale = currentLanguage === 'zh-CN' ? 'zh-CN' :
-                  currentLanguage === 'ja-JP' ? 'ja-JP' :
-                  currentLanguage === 'ko-KR' ? 'ko-KR' : 'en-US';
-
     const defaultOptions: Intl.DateTimeFormatOptions = {
       year: 'numeric',
       month: 'short',
       day: 'numeric',
     };
 
-    return new Intl.DateTimeFormat(locale, options || defaultOptions).format(date);
+    return new Intl.DateTimeFormat('en-US', options || defaultOptions).format(date);
   } catch (error) {
     return date.toLocaleDateString();
   }
diff --git a/src/pages/history/index.tsx b/src/pages/history/index.tsx
index 9a17d51..809f39a 100644
--- a/src/pages/history/index.tsx
+++ b/src/pages/history/index.tsx
@@ -4,7 +4,7 @@ import { useEffect, useState } from 'react';
 import { useServerSdk } from '../../hooks/index';
 import { useI18n } from '../../hooks/useI18n';
 import { i18nManager } from '../../i18n/manager';
-import LanguageSwitcher from '../../components/LanguageSwitcher';
+// import LanguageSwitcher from '../../components/LanguageSwitcher'; // 已隐藏 - 只支持英语
 import './index.css';
 export default function History() {
   const { t } = useI18n();
@@ -127,7 +127,7 @@ export default function History() {
       <View className="history-header">
         <View className="header-content">
           <Text className="history-title">{t('navigation.mine')}</Text>
-          <LanguageSwitcher className="language-switcher-compact" />
+          {/* 语言切换器已隐藏 - 只支持英语 */}
         </View>
       </View>
 
diff --git a/src/pages/home/index.tsx b/src/pages/home/index.tsx
index 6858f37..7ca0513 100644
--- a/src/pages/home/index.tsx
+++ b/src/pages/home/index.tsx
@@ -10,7 +10,7 @@ import { useSdk, useServerSdk } from '../../hooks/index';
 import { useImageDetectionTaskManager, ImageAuditResult, AuditConclusion } from '../../hooks/useImageDetectionTaskManager';
 import { useI18n } from '../../hooks/useI18n';
 import { i18nManager } from '../../i18n/manager';
-import LanguageSwitcher from '../../components/LanguageSwitcher';
+// import LanguageSwitcher from '../../components/LanguageSwitcher'; // 已隐藏 - 只支持英语
 
 import './index.css';
 
@@ -103,10 +103,7 @@ export default function Home() {
 
   return (
     <View className="home">
-      {/* 语言切换按钮 - 右上角浮动 */}
-      <View className="language-switcher-float">
-        <LanguageSwitcher className="compact" />
-      </View>
+      {/* 语言切换按钮已隐藏 - 只支持英语 */}
 
       <ScrollView
         className="home-scroll"