Unlingo

import i18next from 'i18next'; import { initReactI18next } from 'react-i18next';  class UnlingoBackend {  constructor() {  this.type = 'backend';  // You can add own options if needed  this.init();  }   init() {}   async read(language, namespace, callback) {  try {  const url = new URL('/v1/translations', 'https://api.unlingo.com');  url.searchParams.set('release', process.env.UNLINGO_RELEASE_TAG);  url.searchParams.set('namespace', namespace);  url.searchParams.set('lang', language);   const response = await fetch(url.toString(), {  method: 'GET',  headers: {  'x-api-key': process.env.UNLINGO_API_KEY,  'Content-Type': 'application/json',  },  });   if (!response.ok) {  const errorData = await response.json().catch(() => ({}));  return callback(new Error(errorData.error), null);  }   const data = await response.json();  callback(null, data);  } catch (error) {  console.error('Unlingo Backend Error:', error);  callback(error, null);  }  } }  export default UnlingoBackend;  i18next  .use(UnlingoBackend)  .use(initReactI18next)  .init({  ...  });  export default i18next;