It's a neat idea, however, I think this sort of an effort can more effective if open sourced. In fact, it's probably better you open-source it before someone else comes along and does it. To clarify, I am not talking about the UX but only the lists themselves.

If you do go this route, my 2 cents are two keep it JSON formatted and maybe add a severity flag to each word for words like "git" which aren't so bad if you product is targeting non-english audiences while words like "fuck" are really bad irrespective of the audience you are targeting. Taken in conjunction with the population size of the language, this could generate a good score for word safety.