Changing the location of the language selector

Did you mean below the question text? In other words, above the ‘Next’ button but left aligned?

TSAcc
Yes. Left aligned, still above next button

Qualtrics.SurveyEngine.addOnReady(function () {
    let lc = document.querySelector(".LanguageSelectorContainer");
    lc.style.display = "contents";
    this.questionContainer.insertAdjacentElement("beforeend", lc);
});
Demo.

  jQuery("#Buttons").before(jQuery(".LanguageSelectorContainer").css('float','left'));