"Langue d'oïl" (in the singular), "Oïl dialects" and "Oïl languages" (in the plural) refer to all the ancient northern Gallo-Romance languages as well as their modern-day descendants. The most widely spoken modern Oïl language is French, but others include Norman, Walloon, Picard, Gallo, Poitevin-Saintongeais, and Champenois.