app.post('/', (req, res) => {
  const x = translate(req.body.query, req.body.to);
  console.log(x); // vypise Promise { <pending> }
  res.json(x); // v postman pride prazdny objekt {}
})

server.js vracia teraz prazdny objekt

tu funkciu v translator.js mam takto:

const translate = async (string, langCode) => {
  try {
    const x = await axios({
      method: "POST",
      url: process.env.API_URL,
      headers: {
        "content-type": "application/json",
        "x-rapidapi-host": process.env.API_HOST,
        "x-rapidapi-key": process.env.API_KEY,
        "accept": "application/json",
        "useQueryString": true
      },
      params: {
        "profanityAction": "NoAction",
        "textType": "plain",
        "to": `${langCode}`,
        "api-version": "3.0"
      },
      data: [{
        "Text": `${string}`
      }]
    });
    return x;
  } catch (err) {
      console.error(err);
  }
}