User blog comment:Master Sima Yi/Assassinews 14-07-'14 – Two new Assassin's Creed: Unity trailers/@comment-4786308-20140802223247/@comment-2142534-20140803121408

I know this sounds stupid, but I think it will sound more authentic with british accents. Just what Alex said. Most non-french people don't know french accents very well, but english is more prominent and more people can recognise types of their accents than of french. Take Arno for example. If he speaks in some upper-class english accent, I can feel that he is a noble, or well educated. But if he has an upper-class french accent, it doesn't mean as much to most people.

It's not authentic in terms of being french, but it is when it comes to person's background. Both opinions have advantages and disadvantages, and I think it's quite alright that Ubisoft chose it this way.