I think the so called profanity filter is broken. I just tried to create a new family with the following names:
Daar Zan (human Sim)
Eddie Zan (cat Sim)
Mokah Zan (cat Sim)
I got the disallowed word warning. I've uploaded Daar Zan before. Don't know why Eddie would be banned. Tried changing Mokah though don't know why that would be banned either. Nothing I tried was allowed. I literally just tried putting single letters in as the names and still got the banned word warning. The description is blank. It seems literally any text whatsoever is now a disallowed word. Pathetic.
