About 1 month ago, she started to take off her clothes and diapers all of a sudden. She would sometimes announce "ugh, hot" and then just take off everything she has on. She has also started to say really strong words, like "hate", "stupid", "ew, gross", "bad baby". I tried to model other choices of words for her and tell her that "hate" for example is not a nice word - but does she understand? How do we teach her?