Belgium, Switzerland, Spain, come easily to my mind. Switzerland is a very interesting counter-example because although the French-speaking cantons (Romandie) have French as the "prevalent language", meaning that public services are almost exclusively in French, in practice most people speak German too because they're pragmatic about language: the German kantons are the center of economic activity and not speaking German is a huge disadvantage. Quebec, par contre, is full of people that wistfully (I had intended to write "wishfully" but the auto complete was fantastic this time) think they can manage with speaking only French and ignore the rest of the world.