To recap the golden rules:
Lifecycle and end-of-support
The AutoCAD 2021 Language Pack is not a standalone product. It is an official add-on that changes the user interface (menus, tooltips, command line, and dialog boxes) of an existing AutoCAD 2021 installation to another language. It is available for most languages (French, German, Spanish, Chinese, Japanese, Korean, etc.) via the Autodesk Account or the Autodesk Desktop App. autocad 2021 language pack
What a language pack includes