diff --git a/src/locales/dayjs.ts b/src/locales/dayjs.ts
index 7dc8f8b..c0145cd 100644
--- a/src/locales/dayjs.ts
+++ b/src/locales/dayjs.ts
@@ -8,13 +8,13 @@ import { localStg } from '@/utils/storage';
  *
  * @param lang
  */
-export function setDayjsLocale(lang: App.I18n.LangType = 'zh-CN') {
+export function setDayjsLocale(lang: App.I18n.LangType = 'en-US') {
   const localMap = {
     'zh-CN': 'zh-cn',
     'en-US': 'en'
   } satisfies Record<App.I18n.LangType, string>;
 
-  const l = lang || localStg.get('lang') || 'zh-CN';
+  const l = lang || localStg.get('lang') || 'en-US';
 
   locale(localMap[l]);
 }
diff --git a/src/locales/index.ts b/src/locales/index.ts
index 40af8a9..b724159 100644
--- a/src/locales/index.ts
+++ b/src/locales/index.ts
@@ -4,7 +4,7 @@ import { localStg } from '@/utils/storage';
 import messages from './locale';
 
 const i18n = createI18n({
-  locale: localStg.get('lang') || 'zh-CN',
+  locale: localStg.get('lang') || 'en-US',
   fallbackLocale: 'en',
   messages,
   legacy: false
diff --git a/src/service/request/index.ts b/src/service/request/index.ts
index 654a0fa..697b564 100644
--- a/src/service/request/index.ts
+++ b/src/service/request/index.ts
@@ -29,7 +29,7 @@ export const request = createFlatRequest<App.Service.Response, InstanceState>(
       const Authorization = token ? `Bearer ${token}` : null;
 
       // set language
-      const ContentLanguage = localStg.get('lang') || 'zh-CN';
+      const ContentLanguage = localStg.get('lang') || 'en-US';
       Object.assign(headers, { Authorization, "Content-Language": ContentLanguage });
 
       return config;
@@ -148,7 +148,7 @@ export const rawRequest = createRequest(
       const Authorization = token ? `Bearer ${token}` : null;
 
       // set language
-      const ContentLanguage = localStg.get('lang') || 'zh-CN';
+      const ContentLanguage = localStg.get('lang') || 'en-US';
       Object.assign(headers, { Authorization, "Content-Language": ContentLanguage });
 
       return config;