Autocad 2017 French Language Pack 2021 -

and AutoCAD 2021 are different versions. Language packs are version‑specific. → A French language pack designed for AutoCAD 2021 will not work on AutoCAD 2017.

AutoCAD 2017 AutoCAD 2021 in French, you must download and install the specific French Language Pack corresponding to your software version from the Autodesk Account autocad 2017 french language pack 2021

Sign in to your account at https://manage.autodesk.com. Under Products and Services, find your product and click View Downloads. Download and install language packs | Autodesk and AutoCAD 2021 are different versions