In a word: yes. Autodesk support will refuse to troubleshoot any installation where version resources are mixed. If you need official support, use only the 2017 French pack.
: Access your Autodesk Account portal or the official Autodesk Knowledge Network to locate the standalone AutoCAD 2017 French Language Pack . autocad 2017 french language pack 2021
: Often includes localized content libraries, such as templates and catalogs aligned with French drafting conventions. Standalone Shortcuts In a word: yes