Download the pack and run the installer. Ensure AutoCAD is closed before starting the installation. Critical Compatibility Note How to change the language of AutoCAD products - Autodesk
Go to "All Products and Services" and find the "AutoCAD" or "AutoCAD LT" tile. autocad 2014 language packs
In addition to the UI, these packs often include localized help files and documentation. How to Download and Install Download the pack and run the installer