Sign in to the Autodesk Account Management portal. Under "All Products and Services," find AutoCAD 2012, click View Details , and look for the Languages tab.
If you already have AutoCAD 2012 installed in English, you can type _AI_DOWNLOAD_LANGUAGE_PACKS into the command line or select Download Language Packs from the Help menu. This should redirect you to the relevant Autodesk Support page for downloads. Installation Steps for PT-BR autocad 2012 language pack pt br
To use in Portuguese (Brazilian), you must install a specific Language Pack (PT-BR) . These packs allow the software to run in a different language without requiring a full reinstallation of the core product. Where to Find the AutoCAD 2012 Language Pack Sign in to the Autodesk Account Management portal