Truthfully, Celes doesn't know much Chinese, being born in Japan. However, she does know a few words...and she's pretty sure she heard Katt mention something about fornicating. Naturally, this means "it's on, bitch".

The gambler fires back a series of insults in Japanese. Nothing's concrete at the moment, but the best team of monkey translators money can buy assured me she said something along the lines of "Filthy peasant who could only afford to eat by spreading her legs and screwing like the wench she is!"