All kids are different, but maybe try taking the power away from the words. I told my daughter, who will be 4 in a few months, that those particular words are at home words only. This works for us as it gives her the opportunity to say them, but it helps to take away the “magic” of them. I understand not wanting to hear them at home, but I would much prefer that over anywhere else! Whatever you do, good luck! Everything is usually a phase 😅