In France there is an 'A' plate, consisting of a large black A on a large circular white adhesive label. I'm almost certain that nobody is allowed to teach driving on public roads in France unless they are a licensed professional teacher. The French license most other things that might be dangerous ( even estate agents).I live here a lot and have not noticed anyone being supervised as a learner otherwise than by a school. The 'A' plate itself is to be displayed after the candidate has got a full licence and may drive alone; it is shown for some months and there are restrictions on where and how the novice can drive.