There are 45 hours in the PPL course
There are indeed but thats not what the regulation says! The regulation states with reference to a PPL (A)
shall have completed at least 45 hours of flight instruction in aeroplanes
It then goes no to specify a minimum of 25 hours dual instruction and 10 hours solo, leaving a further 10 hours of unspecified instruction or even solo. The 5 hours of night training can be additional to the 35 hours of specified PPL training and still fall within the requirement of 45 hours of flight instruction.
It matters not how the French or anyone care to interpret it, in legal terms it can be done and should be upheld by a court if an Authority fails to comply with the regulation.