Nein, geht nicht (gerade gelesen):
Zitat:
Q: If I purchased a qualifying Windows Vista product in one language version, can I get a different language version for the upgrade? For example, if my PC came with a French version of Windows Vista Home Premium can I get the upgrade as Spanish Windows 7 Home Premium?
A: The Windows 7 Upgrade Option program does not allow for language switching. The language version of the Windows Vista product that you ordered will be the language version of the Windows 7 product you will receive.
Quelle:
http://www.microsoft.com/windows/buy...grade-faq.aspx