Ace wrote:

The only saving grace will be if you'd hired the car in Switzerland.
The French system does not chase foreign-registered vehicles for
traffic offences, despite the legal agreements for them to do so being
in place. I last tested this only a few months ago, getting flashed
more than once in my Swiss-plated car on a French road near where I
live.

Confirm this.

Have found that non-EU foreign registered vehicle with Arabic plates
works best of you are planning really serious work-outs.