Roasted Pig Head in Paris?
The only time I ever heard of "roasted pig's head" was from a close friend of Paul Bocuse in Lyon, who claimed that Monsieur Paul was at his happiest when he could feast with his buddies on whole roasted pig's head after market time.
I never heard of such a thing in any other context. And not in Paris by any means.
But we do have good fromage de tête in some places.