diff --git a/docs/site/mobile.js b/docs/site/mobile.js
index 33588259d..cda377ccc 100644
--- a/docs/site/mobile.js
+++ b/docs/site/mobile.js
@@ -3,11 +3,16 @@ import Locale from '../../src/locale';
 import Lazyload from '../../src/lazyload';
 import { get } from '../../src/utils';
 import { camelize } from '../../src/utils/format/string';
+import enUS from '../../src/locale/lang/en-US';
 
 Vue.use(Lazyload, {
   lazyComponent: true
 });
 
+Locale.add({
+  'en-US': enUS
+});
+
 // helper for demo locales
 Vue.mixin({
   computed: {
@@ -40,6 +45,14 @@ Vue.mixin({
   }
 });
 
+window.vueRouter.afterEach(to => {
+  const { lang } = (to.meta) || {};
+
+  if (lang) {
+    Locale.use(lang);
+  }
+});
+
 // add some basic locale messages
 Locale.add({
   'zh-CN': {