simplest-i18n

main.js

import t from './t';
Vue.prototype.$t = t;

getLang.js

import store from './store/index'
const langs = ['zh-CN', 'en']
const getLang = {
    lang:store.state.lang,
    langs
}

export default getLang;

t.js

import i18n from 'simplest-i18n';
import getLang from './getLang';

const t = i18n({
  locale: getLang.lang, // 当前语言
  locales: getLang.langs // 支持的语言列表
});
export default t;

.vue

 <span>{{ $t("真实姓名", "Real Name") }}</span>