I can see it now:
Sora: Go to f*cking hell, you shizztastic old ba*tard!
MX: Darkness, the dark, dark, f*cking hell, muthafu*ker, whuh...dark?
Sora: No, light the light is the muthaf*ckin' light!
MX: Dark! Dark is the shizz!
*Every other main character just stands back in silence. But in the dim, King Mickey walks forward calmly with Keyblade in tow. Suddenly he races forward and says:*
Mickey: Fcuk this! FEEL THE WRATH OF MY DISNEY CENSORING POWER!
*Then he pulls a Yoda move and they both stop swearing. Sora and MX have been put under the spell of DISNEY CENSORING POWER. Now, unable to wrench themselves free of this strange magic, they both start to hug each other and apologize, and the horizon starts to sparkle with rainbows and candy.*
I can see more violence in KH. But not any harsh swearing except for a "Hell" here and there. I mean, you guys have seen that scene in the DDD Jump Festa trailer, right? Where Ansem picks up Frollo's knife in Notre Dame and points it at Riku? I mean, I'm surprised they even let SE do that.
Then again, it'll probably be censored in the American release and Ansem will be holding a stick, or something non-threatening.