In the French system and other francophone systems, tenured faculty is divided in two categories: maitre de conferences, equivalent to associate professors if I understand correctly, and professeurs, equivalent to full professors.
I'm preparing a list of people for a meeting. I am required to distinguish between no title, Dr., and Prof. The question is simple: should I call the maitre de conferences "professors"? On the one hand, their title is not formally "professor". On the other hand, their rank is equivalent to "associate professor", and so they deserve to be called "professor".
I am interested in a general answer. Not necessarily only for my situation. Call this curiosity if you wish.