Once installed, language packs create a separate desktop shortcut to launch AutoCAD in that language. How to change the language of AutoCAD products - Autodesk
To add a language pack to your AutoCAD 2018 setup, follow these steps via the Autodesk Account : autocad 2018 language packs
When updating AutoCAD 2018, language packs may need to be reinstalled or updated to match the new version of the software. Conclusion Once installed, language packs create a separate desktop