If I may, I'd like a offer a simple scenario which will hopefully put this issue to rest:
1.) Forum Member 1 uses a word that is innocuous in his or her local slang but is offensive in Forum Member 2's slang.
2.) Forum Member 2 expresses his or her offense to the word without getting overly upset.
3.) Forum Member 1 explains the non-offensive usage and intent of the word.
4.) Forum Member 1 apologizes for any offense and promises to make an effort to avoid using the offensive word in the future.
5.) Forum Member 2 accepts apology, understands that Forum Member 1 is not intentionally being offensive, and promises to be mindful that words carry different meanings in different cultures.
We do not need a sticky of forbidden words and we do not need to walk on eggshells. All we need is a little civility and a little class. And there is no sense spending 6 pages analyzing the behavior of a forum member who has neither.