Can AI be used for learning endangered languages?
Well, yes and no. For sure, Artificial intelligence helps sniff and sort out information from different resources and this is definitely a wholesome feature, but there is always one exception. It may be not a very nice idea to ask to teach AI you particular moments, as it's imperfect and may "hallucinate" (misinform users and send gibberish).

AI is okay to use as a supplement tool, which can help you with searching resources up, but be careful with it as well! Happy learning ;)