Users of Autodesk Design Suites in non-English speaking countries can now localize the AutoCAD part of their suites.
While AutoCAD is available in 14 different languages (localizations), the Autodesk Design Suite packages have only limited set of localizations (at least in the version 2012). The users of the English versions of Autodesk Design Suites 2012 can now add their native language to at least one component of their Suite - AutoCAD.
Autodesk has silently (as of Sep 2nd) released a set of downloadable "Language Packs" that can be applied to Autodesk Design Suite 2012 and Autodesk Infrastructure Design Suite 2012. These add-on language packs will localize the plain AutoCAD version (part of the Design Suite) to a selected language. You can choose among English, Simplified Chinese, Traditional Chinese, Czech, German, Spanish, French, Hungarian, Italian, Japanese, Korean, Polish, Portuguese, and Russian.
Language Packs are downloadable for the 32-bit and 64-bit versions of AutoCAD (resp. Design Suite). It is interesting that each language pack has a quite different size (250MB to 550MB). Besides the language pack it is neccessary to update the Content Explorer indexing service. Its language must match the AutoCAD language.
You can download the Language Packs at the AutoCAD support page.