sorry for the later reply, but in my version as shown, there's not an option, but doing it once in game if there is such a option, i'd really not know, but have seen the manual in French, so hopefully someone knows how?
http://www.matrixgames.com/forums/tm.asp?m=4565524i'd have to install it again to be sure, but mine does show only English as an option, so no idea how tbh