小程序如何自动切换语言，才能兼顾精准性和适用性？

// 获取用户语言
const api = {
  getlanguage: () => new promise((resolve) => {
    settimeout(() => {
      const lang = 'zh_cn';
      resolve(lang);
    }, 1000);
  }),
};

// 获取系统语言
const getsysteminfo = () => new promise((resolve) => {
  window.wx.getsysteminfo({
    success: (res) => {
      resolve(res.language);
    },
  });
});

/**
 * 获取用户语言
 * @return {promise<string>}
 */
const getlanguage = async () => {
  const defaultlanguage = 'zh_cn';

  const remotelanguage = await api.getlanguage();
  if (remotelanguage) {
    return remotelanguage;
  }

  const systemlanguage = await getsysteminfo();
  if (systemlanguage) {
    return systemlanguage;
  }

  return defaultlanguage;
};

const main = async () => {
  const language = await getlanguage();

  // 将 language 注入到全局使用中
};

main();

// main.js
import { createApp } from 'vue'
import { createI18n } from 'vue-i18n'

const main = async () => {
  const language = await getLanguage();

  const messages = {
    zh: {
      apple: '苹果',
    },
    en: {
      apple: 'apple',
    },
  }

  const i18n = createI18n({
    locale: language,
    messages,
  })

  const app = createApp({
    // ...
  })

  app.use(i18n)
  app.mount('#app')
}