https://quizlet.com Hack :) Doesn't work well, and I'm too lazy to finish it

userscipt.js

apikey = "trnsl.1.1.20191018T093555Z.b6bd9f9ec98d78a9.134f73cb647d78dc17a4723deb47325790d768f0"
// Get apikey from https://tech.yandex.com/translate/
setInterval(() => {
    try {
        totranslate = document.getElementsByClassName('FormattedText notranslate TermText lang-pl');
        totranslate[0].innerText = translate(totranslate[0].innerText);
        totranslate[1].innerText = translate(totranslate[1].innerText);
        totranslate[2].innerText = translate(totranslate[2].innerText);
        totranslate[3].innerText = translate(totranslate[3].innerText);
    } catch (e) {
        console.log(e);
    }
},1500)
function httpGet(theUrl)
{
    var xmlHttp = new XMLHttpRequest();
    xmlHttp.open( "GET", theUrl, false ); // false for synchronous request
    xmlHttp.send( null );
    return xmlHttp.responseText;
}
function getJsonHttp(theUrl) {
    response = httpGet(theUrl)
    return JSON.parse(response)
}
function translate(wat) {
  url = "https://translate.yandex.net/api/v1.5/tr.json/translate?key="+apikey+"&text="+encodeURIComponent(wat)+"&lang=en"
  response = getJsonHttp(url).text[0];
  return response;
}