export default {
 home: {
 helloworld: "hello workd ！"
 }
};

export default {
 home: {
 helloworld: "你好世界"
 }
};

import Vue from "vue";
import VueI18n from "vue-i18n";
import enLocale from "./en";
import zhLocale from "./zh";
Vue.use(VueI18n);
const i18n = new VueI18n({
 locale: localStorage.lang || "zh",
 messages: {
 en: {
  ...enLocale
 },
 zh: {
  ...zhLocale
 }
 }
});
export default i18n;

import Vue from "vue";
import App from "./App.vue";
import router from "./router";
import store from "./store";
import i18n from "./assets/i18n/index";
Vue.config.productionTip = false;
Vue.prototype.$i18n = i18n;
new Vue({
 router,
 store,
 i18n,
 render: h => h(App)
}).$mount("#app");

<template>
 <div class="about">
 <h1>{{ $t("home.helloworld") }}</h1>
 <button @click="changeLang()">切换英文</button>
 <p>{{hi}}</p>
 </div>
</template>
<script>
export default {
 data: function() {
 return {};
 },
 computed: {
 hi() {
  return this.$t("home.helloworld");
 }
 },
 methods: {
 changeLang() {
  this.$i18n.locale = "en";
 }
 }
};
</script>