The installation program of the graphics acceleration driver "nVidia Performance Driver" supports only English versions of plain AutoCAD. But using the following procedure you can install it even on e.g. Czech version of AutoCAD Architecture.
You can trick the setup by impersonating the plain English AutoCAD version, installing the driver and immediately returning the impersonalization back to the original. Please perform the registry changes carefully and with AutoCAD not running.
The signature of the AutoCAD application (any version) can be found in the Registry (example of Architecture 2011):
Rename this key (using RegEdit.exe) to ACAD-9001:409. (for version 2010 rename the original key "R18.0\ACAD-8004:405".) Now run the nVidia driver installation - it should complete without errors. Immediately after this installation rename the registry key to its original value! Only the run your AutoCAD Architecture (or other vertical) and choose the new driver.