I got my shit handed to me because I said someone is mentally challenged. But apparently where I work that is considered hate speech. Is there a place where I can read the new terms? Like do we call all people from South America something or is it like Spanish American or Mexican American and so forth?


I think the currently accepted term is “developmentally disabled”.
As far as a racial term for Americans with African heritage, I’ve met some people who prefer African-American, and others you consider it stodgy and misleading and prefer black.
There’s a mild pref to put people first, e.g. “a person with cognitive or developmental disabilities”, but I don’t think yours is offensive, although it might get a comment.
Like when I first became a wheelchair user, I would say I was “chairbound” or “wheelchairbound” - but someone pointed out that some people won’t help people in wheelchairs in emergencies because of a mistaken belief that anyone in a wheelchair can’t be removed from it (many can stand and/or walk some short distance, others can’t). So “chair user” is much better. Not to correct anyone, just because it can help in emergencies or whatever.