Tri-lingual

For the next three centuries [after the Normans invaded], three different languages were heard in England. The churchmen, the scholars, and sometimes the lawyers used the international language, Latin. English remained the tongue of the bulk of the population; for we must remember that there were perhaps a million native English (Anglo-Saxons) and only a few thousand Normans. The new Norman French was the polite tongue of the royal court and of the dominant feudal minority.

(from A History of England and the British Empire)