I likely have the French audio tracks for the main movies since I only use the UK versions of the films for my edits, but I doubt the deleted scenes have them since they are unfinished clips. I would have to check. That certainly wouldn’t be on my priority list though.
I cam maybe create the missing french subtitles for the added scenes and also sync the french audio track to your edits, starting with the 3rd movie first maybe? Let me you in PM. It will be for my own personal use first anyway.
“to release my own personal edit of that film”
What did you edit in those 2 extended movies?