我使用i18next和一个自定义语言检测器来检测异步存储中的语言，但看起来检测方法甚至没有被调用，每次都选择了fallbackLanguage = 'en'。

import i18n from 'i18next';
import { initReactI18next } from 'react-i18next';
import en from './languages/english.json';
import hi from './languages/hindi.json';
import kn from './languages/kannada.json';
import ta from './languages/tamil.json';
import AsyncStorage from '@react-native-async-storage/async-storage';

const resources = {
  en: en,
  hi: hi,
  kn: kn,
  ta: ta,
};

let fallbackLanguage = 'en';

const languageDetector = {
  type: 'languageDetector',
  async: true,
  detect: async (callback) => 
    try {
      const language = await AsyncStorage.getItem('language');
      console.log('lllanguage', language);
      if (language) {
        console.log('Detected language:', language);
        callback(language);
      } else {
        console.log('No language detected, falling back to default language:', fallbackLanguage);
        callback(fallbackLanguage);
      }
    } catch (error) {
      console.error('Failed to get language from async storage:', error);
      callback(fallbackLanguage);
    }
  },
  fallbackLng: fallbackLanguage,
};

i18n
  .use(languageDetector)
  .use(initReactI18next)
  .init({
    compatibilityJSON: 'v3',
    lng: fallbackLanguage,
    resources,
    interpolation: {
      escapeValue: false,
    },
  });

export default i18n;

localstorage有项目“语言”，并设置预期的值，我想每次我打开应用程序，它从异步存储检测语言，并没有失去关闭时的状态.