AutoCAD 2021 and newer include via the Autodesk Desktop App. No separate pack needed. If you have an active subscription, simply install AutoCAD 2021 or 2023 and select French during initial setup.
A language pack is a module that replaces or supplements the user interface (UI), tooltips, command lines, help files, and default templates of AutoCAD. It does not change the software’s core engine, nor does it translate custom block names or LISP routines. autocad 2017 french language pack 2021