Thanfully the AI doesn't call you that at least, and she's with you the most XD Everything has subs though, even the cutscenes, so you can play on mute and not worry about missing info or bad pronounciationsBut...but...how will you know when you become a "som-oo-rai"?
Actual spoilers:
In the game you need to touch the touch screen/gauntlet before it recognizes you as a samurai. I was amused with the monks there saying "look at the mystical text!" and there was some Japanese on the gauntlet screen XD