Ni hao ma!
Hot on the heels of the RTM release of ASP.NET MVC 3, we now have localized versions of ASP.NET MVC in 9 languages! The installation links within the Web Platform Installer was updated. If you want to download the installer yourself, you can go to the English download page and select your language or click on one of the nine languages below:
If you speak one of these nine languages, you can now develop with ASP.NET MVC in your native language. Salud!