cnpm install vue-i18n --save-dev 

import Vue from 'vue' 
import router from './router' 
import VueI18n from 'vue-i18n' 
Vue.use(VueI18n) 
const i18n = new VueI18n({ 
 locale: 'zh', // 语言标识 
 messages: { 
  'zh': require('./assets/lang/zh'), 
  'en': require('./assets/lang/en') 
 } 
}) 
// vue实例中引入 
/* eslint-disable no-new */ 
new Vue({ 
 el: '#app', 
 i18n, 
 router, 
 template: '<Layout/>', 
 components: { 
  Layout 
 }, 
}) 

module.exports = { 
 menu : { 
   home:"首页" 
 }, 
 content:{ 
   main:"这里是内容" 
 } 
} 

module.exports = { 
 menu : { 
   home:"home" 
 }, 
 content:{ 
   main:"this is content" 
 } 
} 

<div class="title">{{$t('menu.home')}}</div> 

<input :placeholder="$t('content.main')" type="text"> 

console.log(this.$t('content.main')); 

tabEn: function () { 
 this.$i18n.locale = 'en' 
}, 
tabCn: function () { 
 this.$i18n.locale = 'zh' 
}