Muso

Old French (franceis, françois, romanz; Modern French: ancien français) was the language spoken in most of the northern half of France approximately between the 8th and the 14th century. Rather than a unified language, Old French was a linkage of Romance dialects, mutually intelligible yet diverse. These dialects came to be collectively known as the langue d'oïl, contrasting with the langue d'oc in the south of France.
The mid-14th century witnessed the emergence of Middle French, the language of the French Renaissance in the Île de France region; this dialect was a predecessor to Modern French. Other dialects of Old French evolved themselves into modern forms (Poitevin-Saintongeais, Gallo, Norman, Picard, Walloon, etc.), each with its own linguistic features and history.
The region where Old French was spoken natively roughly extended to the northern half of the Kingdom of France and its vassals (including parts of the Angevin Empire, which during the 12th century remained under Anglo-Norman rule), and the duchies of Upper and Lower Lorraine to the east (corresponding to modern north-eastern France and Belgian Wallonia), but the influence of Old French was much wider, as it was carried to England and the Crusader states as the language of a feudal elite and commerce.