Ahaa, thanks. I try my best to represent the different nationalities as actually different rather than just "This girl is from X, that means she looks like this."
Sasha is one of my favourites. Definitely my favourite of the side stories overall, since I love her ghost hunting stuff. It's funny though, she actually causes issues with the accents and all that you mentioned, because a Russian translation is being worked on for the game at the moment, and the guy is having some difficulty trying to work out how to translate the fact she speaks broken English, but perfect Russian, into Russian. I don't envy his task, for it is complicated. He faces a unique challenge not necessarily faced by other translators, but I'm sure he's up to the task.