Axios + Microsoft Translate API Strange symbols in response

I'm trying to get list of languages using Microsoft Translate Free Api from rapidapi.com. But in response I receive hundreds og these strange charachters:

����: example

Here is my axios config:

const axios = Axios.create({
  baseURL: "https://text-translator2.p.rapidapi.com",
  headers: {
    "Content-Type": "application/json",
    "Accept-Language": "en",
    "Accept-Encoding": "null",
    "X-RapidAPI-Key": ".../.../...",
    "X-RapidAPI-Host": "microsoft-translator-text.p.rapidapi.com",
  },
  params: { "api-version": "3.0" },
});

Maybe someone knows how to solve this problem?
API link: https://rapidapi.com/microsoft-azure-org-microsoft-cognitive-services/api/microsoft-translator-text