In Windows Vista, the MUI architecture separates the language resources for the user interface from the binary code of the operating system. This separation makes it possible to change languages completely without changing the core binaries of Windows Vista, or to have multiple languages installed on the same computer.

Now, there are direct links from Microsoft official site. As follow…

Windows Vista 32bit Ultimate & Enterprise:
Traditional Chinese (Taiwan)
Simplified Chinese (China)
English (US)
Italian
Spanish
Swedish
Japanese
Portugese (Brazil)
Norwegian
Dutch
Finnish
French
Russian
German
Danish
Korean

Windows Vista 64bit Ultimate & Enterprise:
Traditional Chinese (Taiwan)
Simplified Chinese (China)
English (US)
Italian
Spanish
Swedish
Japanese
Portugese (Brazil)
Norwegian
Dutch
Finnish
French
Russian
German
Danish
Korean