Want to see what Windows 7 may look like in your native language, and you have been frustrated by the lack of available language versions of Windows 7 RC? Be frustrated no more. Microsoft today released 31 Language Packs for Windows 7 RC through Windows Update;
As it is stated in the information on the Language Packs;
After you install this language pack, you can change the display language of Windows 7 to be (your chosen language), Go to the Clock, Language, and Region category in the Control Panel to change the display language.
I will try out the Norwegian Language Pack in the hope that this will not degrade my system significantly, bearing in mind my decision to revert to the English version after trying out the Norwegian x86 version of Windows 7 RC the other day.