Don't necessarily reinstall the client. First, before starting the game up, look in the 'Options' tab of the menu (where you push start to launch the client). Make sure the game is set to English. Now see if everything is ok.
No dice? Well, it should work, if not I'll try to find the old way I did it when I first installed Euro. Tell me if it works!
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Edit: lol, i remembered. If that does not work, try deleting silkcfg.dat and SilkRoadGlobal.ini from the SRO Folder in your programs folder (or wherever you installed it to.)
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