Audible Warnings
I have been chasing this with the Renault R-Link helpline. There doesn't appear to be any audible warnings of speed cameras. They did suggest using the adaptive cruise control which reads the road signs and controls the speed accordingly. You can even offset the speed it drives to be 5 mph above or below the road sign. The only problem is the system misses too many signs and picks up too many 20 mph signs from side roads to make the system useful. The lack of speed camera warnings is probably due to that type of system being illegal in France so there wouldn't have been much need in Renault to develop the system.