: After installing the language pack, it is often necessary to update the Content Explorer indexing service so that its language matches your interface. Download and install language packs | Autodesk
They are available for both 32-bit and 64-bit operating systems. How to Download the PT-BR Language Pack autocad 2012 language pack pt br
The installer will ask for a location to extract files. Use the default path and click "Install". Finish Installation: Autodesk AutoCAD 2012 Language Pack Portuguese (Brazil) -
: The first place to check would be the official Autodesk website. Autodesk usually provides language packs for its software products, including AutoCAD. You might need to search for "AutoCAD 2012 language packs" or specifically for "Portuguese (Brazil)" on the Autodesk website. Use the default path and click "Install"
Check the tab to see if the Portuguese - Brazil (Português - Brasil) pack is still available for download.