Board Game Arena

Are we allowed to use inappropriate words as clues, provided they would actually be a useful clue?

I'm thinking of swear words, specific body parts, and cruel/offensive historical figures.
Examples: 'vagina' for hole, 'Hitler' or 'Stalin' for mustache

I don't know about any specific rule but I would be consider context. In a public game you could be potentially playing with children and the use of derogatory or vulgar words would certainly be inappropriate and I have seen many of these words before in games. However if the word is something like dictator and you say Hitler then I don't think that would be inappropriate. Just use common sense and unless you are playing games with friends then avoid the use of derogatory but especially vulgar words.