In short, I need curse words and/or terms of endearment in any/all of the following languages: Irish Gaelic, Arabic, Romanian, Welsh, Russian, Croatian, Chinese (Mandarin), Greek. They're listed in order of importance, and sticking to the Roman alphabet renderings would be preferable.
If anyone knows a really good translation site (do they actually exist?) that I can go to for any of this in the future, that would also be lovely, but I'm not holding my breath.
EDIT: Thank you all very much! This was hugely helpful.