diff --git a/web/package.json b/web/package.json
index 652417f4..31c7c2f3 100644
--- a/web/package.json
+++ b/web/package.json
@@ -27,6 +27,7 @@
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
     "react-easy-crop": "^3.5.2",
+    "react-helmet": "^6.1.0",
     "react-redux": "^7.2.4",
     "react-router": "^5.2.0",
     "react-router-dom": "^5.2.0",
@@ -48,6 +49,7 @@
     "@types/node": "^15.12.5",
     "@types/react": "^17.0.11",
     "@types/react-dom": "^17.0.8",
+    "@types/react-helmet": "^6.1.2",
     "@types/react-router": "^5.1.15",
     "@types/react-router-dom": "^5.1.7",
     "@types/react-transition-group": "^4.4.2",
diff --git a/web/src/App.tsx b/web/src/App.tsx
index ff0e5efe..8a1f7038 100644
--- a/web/src/App.tsx
+++ b/web/src/App.tsx
@@ -1,10 +1,11 @@
 import React, { useCallback } from 'react';
 import { BrowserRouter, Redirect, Route, Switch } from 'react-router-dom';
-import { TcProvider, useColorScheme } from 'tailchat-shared';
+import { TcProvider, useColorScheme, useLanguage } from 'tailchat-shared';
 import clsx from 'clsx';
 import { Loadable } from './components/Loadable';
 import { ConfigProvider as AntdProvider } from 'antd';
 import { parseColorScheme } from './utils/color-scheme-helper';
+import { Helmet } from 'react-helmet';
 
 const MainRoute = Loadable(() =>
   import('./routes/Main').then((module) => module.MainRoute)
@@ -64,9 +65,21 @@ export const AppContainer: React.FC = React.memo((props) => {
 });
 AppContainer.displayName = 'AppContainer';
 
+const AppHeader: React.FC = React.memo(() => {
+  const { language } = useLanguage();
+
+  return (
+    <Helmet>
+      <meta httpEquiv="Content-Language" content={language} />
+    </Helmet>
+  );
+});
+AppHeader.displayName = 'AppHeader';
+
 export const App: React.FC = React.memo(() => {
   return (
     <AppProvider>
+      <AppHeader />
       <AppContainer>
         <Switch>
           <Route path="/entry" component={EntryRoute} />
diff --git a/yarn.lock b/yarn.lock
index d31660e0..f1a6d356 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2041,6 +2041,13 @@
   dependencies:
     "@types/react" "*"
 
+"@types/react-helmet@^6.1.2":
+  version "6.1.2"
+  resolved "https://registry.nlark.com/@types/react-helmet/download/@types/react-helmet-6.1.2.tgz#e9d7d16b29e4ec5716711c52c35c3cec45819eac"
+  integrity sha1-6dfRaynk7FcWcRxSw1w87EWBnqw=
+  dependencies:
+    "@types/react" "*"
+
 "@types/react-redux@^7.1.16":
   version "7.1.16"
   resolved "https://registry.yarnpkg.com/@types/react-redux/-/react-redux-7.1.16.tgz#0fbd04c2500c12105494c83d4a3e45c084e3cb21"
@@ -9515,6 +9522,21 @@ react-fast-compare@^2.0.1:
   resolved "https://registry.npmjs.org/react-fast-compare/-/react-fast-compare-2.0.4.tgz#e84b4d455b0fec113e0402c329352715196f81f9"
   integrity sha512-suNP+J1VU1MWFKcyt7RtjiSWUjvidmQSlqu+eHslq+342xCbGTYmC0mEhPCOHxlW0CywylOC1u2DFAT+bv4dBw==
 
+react-fast-compare@^3.1.1:
+  version "3.2.0"
+  resolved "https://registry.npm.taobao.org/react-fast-compare/download/react-fast-compare-3.2.0.tgz#641a9da81b6a6320f270e89724fb45a0b39e43bb"
+  integrity sha1-ZBqdqBtqYyDycOiXJPtFoLOeQ7s=
+
+react-helmet@^6.1.0:
+  version "6.1.0"
+  resolved "https://registry.nlark.com/react-helmet/download/react-helmet-6.1.0.tgz#a750d5165cb13cf213e44747502652e794468726"
+  integrity sha1-p1DVFlyxPPIT5EdHUCZS55RGhyY=
+  dependencies:
+    object-assign "^4.1.1"
+    prop-types "^15.7.2"
+    react-fast-compare "^3.1.1"
+    react-side-effect "^2.1.0"
+
 react-i18next@^11.11.0:
   version "11.11.0"
   resolved "https://registry.yarnpkg.com/react-i18next/-/react-i18next-11.11.0.tgz#2f7c6cb4f81f94d1728a02d60e4bb5216709f942"
@@ -9591,6 +9613,11 @@ react-router@5.2.0, react-router@^5.2.0:
     tiny-invariant "^1.0.2"
     tiny-warning "^1.0.0"
 
+react-side-effect@^2.1.0:
+  version "2.1.1"
+  resolved "https://registry.npm.taobao.org/react-side-effect/download/react-side-effect-2.1.1.tgz#66c5701c3e7560ab4822a4ee2742dee215d72eb3"
+  integrity sha1-ZsVwHD51YKtIIqTuJ0Le4hXXLrM=
+
 react-transition-group@^4.4.2:
   version "4.4.2"
   resolved "https://registry.npmjs.org/react-transition-group/-/react-transition-group-4.4.2.tgz#8b59a56f09ced7b55cbd53c36768b922890d5470"