Language packs are completely free to download.
Technical limits and drawbacks
If you no longer need a particular language pack, you can remove it without affecting your main AutoCAD installation:
Close all active applications, especially running instances of AutoCAD 2021.
Unlike older methods (e.g., installing a full localized version), the language pack lets you switch between languages without uninstalling/reinstalling AutoCAD. You simply launch the desired language shortcut from the Start Menu.
Here is the complete content regarding the , including what it is, supported languages, download instructions, and installation steps.
You can find these packs through your official account portal or directly within the software: Sign in to Autodesk Account.