French Catholic "Fundies", or Integristes

Interesting observation here.

Where do the fundamentalists come from?

The vast majority of the faithful are those nostalgic for the Church before 1965 and especially the Latin Mass. However, the leaders of the movement are priests and lay people who are much more arrogant and who often belong to the extreme right. Sociologically, they consist mainly of large families of aristocratic and bourgeois tradition who are very committed to the moral order and the Catholic tradition. But it is not exclusive - they also recruit from the mainstream. --Henri Tincq, Le Parisien interview.

The French term for "fundamentalist" is "integriste" and has approximately the same connotation as does "fundamentalist" in the US.