User blog comment:Master Sima Yi/Assassinews 14-07-'14 – Two new Assassin's Creed: Unity trailers/@comment-4786308-20140802223247/@comment-2142534-20140803183912

I'm sure they did some thinking and testing before choosing to do this. In my opinion, after seeing the Singleplayer Demo and Gameplay Trailer, his accent fits very well into the context.