feature[Vuex]: auto import vuex modules(#1815)

src/lang/index.js

@@ -24,11 +24,24 @@ const messages = {
     ...elementEsLocale
   }
 }
+export function getLanguage() {
+  const chooseLanguage = Cookies.get('language')
+  if (chooseLanguage) return chooseLanguage
 
+  // if has not choose language
+  const language = (navigator.language || navigator.browserLanguage).toLowerCase()
+  const locales = Object.keys(messages)
+  for (const locale of locales) {
+    if (language.indexOf(locale) > -1) {
+      return locale
+    }
+  }
+  return 'en'
+}
 const i18n = new VueI18n({
   // set locale
   // options: en | zh | es
-  locale: Cookies.get('language') || 'en',
+  locale: getLanguage(),
   // set locale messages
   messages
 })