Please do not make duplicate threads. One thread per topic please.
Your original thread in TTB (
http://www.lucasforums.com/showthread.php?t=185732), lets keep the discussion to that one. Closing this one.
OT: There is no game 'files' that can be sent to change the language, you will need to buy an english version of the game, unfortunately.
I do not know the retail laws in Belgium but if there is nothing to cover you, the consumer, then your only recourse is to simply never go in the store with that 'no exchange or return' policy again. Sorry.