I knew that last bit, but somehow missed the selector, large as it is. Being Dutch, I am used to regional and local buses/coaches being more integrated (we also only have a single word for them both),[0] so it didn't immediately cross my mind. Very nice site, you do seem to have most of those regional cars!

[0] We do have touringcars, but those are more used for private rentals, not public transport, except for Flixbus etc. and a handful of longer-distance lines, and then we usually call them a bus again.

Thanks ! Yes, the French system is strange, it's a mess. Regionalised.