The most reliable way to get the official French language pack is through your Autodesk account:

Switch to the Languages tab (or Updates & Add-ons in some interfaces).

Right-click the file and select Run as Administrator to ensure the system has the necessary permissions.

Follow the prompts in the installation wizard, accept the terms, and click Install .

Installing the pack does not automatically change your existing shortcut. To open AutoCAD in French: How to change the language of AutoCAD products - Autodesk

Select French (Français) and click the Download button. Installation Steps