I can't speak about all the Final Fantasy games, but Final Fantasy VII doesn't seem to be censored for US/EU release. Barrett doesn't swear nearly as much as he does in the English language version. Cloud is also a huge sissy in the Japanese version, and it pisses me off now and then. Aeris is what people would generally call a "**** tease," at least for the Midgar part of the game.
I'm only at Junon right now, things might change. But, as I said, no apparent game breaking censoring so far.
I realy do not know, i did read it on some FF fansite, i do have all Japanese versions of the games aswell, have to play them on PC emulators because i dont have japanese PS the problem is i dont understand japanese