diff --git a/site/theme/template/Layout/Header.jsx b/site/theme/template/Layout/Header.jsx
index 080a51980c..982380b2d8 100644
--- a/site/theme/template/Layout/Header.jsx
+++ b/site/theme/template/Layout/Header.jsx
@@ -152,13 +152,9 @@ export default class Header extends React.Component {
                 {options}
               </Select>
             </div>
-            {
-              window.location.port ? (
-                <Button id="lang" type="ghost" size="small" onClick={this.handleLangChange}>
-                  <FormattedMessage id="app.header.lang" />
-                </Button>
-              ) : null
-            }
+            <Button id="lang" type="ghost" size="small" onClick={this.handleLangChange}>
+              <FormattedMessage id="app.header.lang" />
+            </Button>
             <Menu mode={this.state.menuMode} selectedKeys={[activeMenuItem]} id="nav">
               <Menu.Item key="home">
                 <Link to="/">
diff --git a/site/theme/template/Layout/index.jsx b/site/theme/template/Layout/index.jsx
index e0884360b9..ca0f650c73 100644
--- a/site/theme/template/Layout/index.jsx
+++ b/site/theme/template/Layout/index.jsx
@@ -12,9 +12,8 @@ window.react = React;
 window['react-dom'] = ReactDOM;
 window.antd = require('antd');
 
-const isZhCN = (typeof localStorage !== 'undefined' && localStorage.getItem('locale') !== 'en-US');
-  // (typeof localStorage !== 'undefined' && localStorage.getItem('locale') === 'zh-CN') ||
-  // (navigator.language === 'zh-CN');
+const isZhCN = (typeof localStorage !== 'undefined' && localStorage.getItem('locale') === 'zh-CN') ||
+        (navigator.language === 'zh-CN');
 
 const appLocale = isZhCN ? cnLocale : enLocale;
 addLocaleData(appLocale.data);