So, just because you think using foul language is acceptable in a game where minors might be playing, it does not mean it is allowed. Our EULA which you quickly dismiss clearly states that foul language, attempts to bypass our word filters are also EULA violations. So it sounds like your chat ban was warranted and will stand.
If you are having to work to try to say the expletives that you wish to use in our chat, chances are, those words are not needed.
Also, just because someone is American or not, doesn't mean that people wouldn't understand why you want to use those words, nor does it make those words okay. I am American and have zero tolerance for them in a game that children can be playing.
If language you are trying to use in a game is not language you would use in regular conversation with a loved one, I would say they don't belong in our chat either.
Also, just because you don't think moderation occurs with people that use words that you see in chat, it does not mean it doesn't happen. Sometimes it takes our system time to catch.
-Hapa