keyword moderation is terrible and only affects the language(s) you know about. It doesn't actually prevent the content (the goal of these types of filters) from being served. It'd be like a virus scanner preventing a program from running because it had the name 'virus' in it ... which would prevent itself from running -- probably.
My favorite is the online name censoring in video games. Dark Souls infamously just does a straight check of any string match within the name against a big list of no-no words. So in this fantasy game where everyone is running around as a knight, anyone who has "knight" in their game will appear as "k***ht" to other players. There's also a famous image I've seen online from another game where the guy's name was Nasse…
https://wow.tools/dbc/?dbc=namesprofanity&build=10.0.5.47660...
They spent great effort to build this list.
Most character names in the game are lame anyway and some are just offensive or inappropriate.