languageApi.js

const axios = require('axios')

module.exports = {
  
  translate: async (text) => {
    try {
      const lang = checkLang(text)
      if (lang === 'en') {
        return text
      }
      else if (lang === 'zh') {
        return await request(text, 'zh', 'en')
      } else if (lang === 'ru') {
        return await request(text, 'ru', 'en')
      }
    } catch (error) {
      console.log(error)
      return text
    }
  }
}

const checkLang = (words) => {
  if (containsChinese(words)) {
    return 'zh'
  } else if (containsRussian(words)) {
    return 'ru'
  } else {
    return 'en'
  }
}

const containsChinese = (words) => {
  const chineseRegex = /[\u4E00-\u9FFF]/
  return chineseRegex.test(words)
}

function containsRussian(words) {
  const russianRegex = /[\u0400-\u04FF]/
  return russianRegex.test(words)
}


const request = async (message, from, to) => {
  const options = {
    method: 'POST',
    url: 'https://ai-translate.p.rapidapi.com/translate',
    headers: {
      'content-type': 'application/json',
      'X-RapidAPI-Key': process.env.XRapidAPIKey,
      'X-RapidAPI-Host': process.env.XRapidAPIHost
    },
    data: {
      texts: [
        message
      ],
      sl: from,
      tl: to
    }
  }
  try {
    const response = await axios.request(options);
    if (response.data.code === 200) {
      return response.data.texts
    }
  } catch (error) {
    console.error(error);
  }
}

tgStuff

const TelegramBot = require('node-telegram-bot-api')
const bot = new TelegramBot(process.env.TELEGRAM_API_KEY, { polling: true })
const room = process.env.TELEGRAM_ROOM

const { translate } = require('./languageApi.js')

bot.on('message', async (msg, match) => {
  try {

      // if the response does not equal the text send a translation
      const text = await translate(msg.text)
      if (text !== msg.text && typeof text !== 'undefined') {
        await bot.sendMessage(room, msg.from.first_name + ': ' + text)
      }