think i could have been there - i went to a paintball site somewhere round that area, it was cheap 5 euros for 100 refill, was pretty safe. it was in more of a tourist region so they spoke english very well whether its the same place im not sure
If anyone is interested i got my email back from the french guys which goes a little like:
bonjours
vous pouver venir jouer sur notre site avec votre équipement.
il y a juste les billes a acheter sur place et 15 euro d accès au terrain pour le week end bon paint
which translates to:
Hellos you pouver to come to play on our site with your equipment. there is just the marbles has to buy on the spot and 15 Euros d accesses to the land for the week end good paint
which im guessing that it kinda means they dont speak any english, also i hope they dont shoot marbles.