: Ensure AutoCAD is closed before running the executable (.exe) file.

For AutoCAD 2016, you can typically find and install language packs following these steps: Open the Application : You can sometimes initiate the process by clicking the arrow (question mark) in the top-right and selecting Language Pack Access Autodesk Account : Sign in to the Autodesk Account portal Find Your Product All Products and Services , find AutoCAD 2016, and click View Details : Select the tab, choose your preferred language, and click Run Installer