It became illegal in Switzerland a few years ago and speed cameras were removed from my TomTom automatically without any warning.
There is an iPhone app "Cams Ahoy" that still worked in Switzerland so it may work in France.
This from TomTom website
Updates are automatically uploaded to your device once you connect your device to MyTomTom. More information can be found here.
It is illegal to receive speed camera alerts in France. This update removes the speed camera alerts for France from your device. We will not send you any more speed camera location updates for France. When available, we will update this service to warn about danger zones in France.