with the chat thing, dont you just write with a pen on the screen? so just dont write in japanese and you'd be fine.
or just look over and actually talk to the person next to you instead of sending him a 2 word message. lol
You're problem would be in the systems menu's because it does other things instead of just plugging a game in. all the menu systems and stuff would be in another language, unless it has language settings to change.