If you are learning a new language pack, turn off (F12). The floating tooltip can be distracting. Use the traditional command line at the bottom; it shows the full translated command history, which is excellent for learning.
Check Control Panel > Programs and Features to confirm the language pack was properly installed. Autocad Language Pack 2021
An AutoCAD language pack is an installer that adds a specific language user interface (UI) and documentation to your existing AutoCAD installation. Instead of buying or downloading multiple full versions of AutoCAD, you download a lightweight pack that applies a local language overlay. Key Benefits Free to download for valid license holders. If you are learning a new language pack, turn off (F12)
You can switch between languages by simply using different shortcuts! No need to pick just one. Check Control Panel > Programs and Features to
Ensure that AutoCAD 2021 is fully installed and activated.