No. Language packs only add text strings, localized menus, and help documentation. They do not increase the CPU or RAM usage of the core AutoCAD application.

: Once extraction finishes, the language pack installer will start automatically. Follow the on-screen prompts to complete the setup.

Absolutely. You can install several packs and use the distinct shortcuts created on your desktop to launch whichever version you need for a specific project. How to change the language of AutoCAD products - Autodesk

If you use Autodesk software, you might need to work in a different language. Autodesk provides official language packs for this purpose. These packs let you change your user interface and documentation language. You do not need to buy a separate software license to use them.

You don’t need to uninstall your base English version of AutoCAD 2021.

Language packs for AutoCAD 2021 are for users who already have a licensed version of the software installed. These packs allow you to run the program in your preferred language without needing to reinstall the core software. How to Download and Install You can obtain these packs through two primary methods: