The official way to get a language pack is through your Autodesk Account .
Installing the pack doesn't automatically change your current interface. Instead, it creates a for that specific language. AutoCAD 2021 Language Packs - Autodesk
: Ensure all instances of AutoCAD are closed during the installation to avoid errors. How to Switch Languages After Installation
Before starting, ensure on your computer.
: Once extracted, the language pack installer will typically start automatically. Follow the on-screen prompts and click the final Install button.
Running software in your native language can significantly boost productivity, especially with complex design tools like . Autodesk allows users to add different interface and documentation languages through dedicated language packs without needing to reinstall the entire program. Where to Find the AutoCAD 2021 Language Pack
How to Download and Install the AutoCAD 2021 Language Pack for Free