Though I thought I was almost alone wearing a kilt in France, I recently came across a forum, with the strange name "Cramax", aimed at French-speaking kilt-wearers.
It already has over 80 members, which makes me think that kilt wearing may be spreading more quickly than we thought.
Age range : 20 - 64 (me!); the average seems to be surprisingly low.
The excuse here, for those that need one, is that Britanny is celtic, and Normandy was founded by the norse who may have brought tartans to the world in the first place, while, in the centre of France, is Aubigny where the Auld Alliance was sealed.

Vive le kilt !

Martin