1644: French in Parliament of England Jun 15, 2019

It is hard—though not impossible—to overstate the influence of French on the English language. While French was spoken by the ruling minority, even Englishmen began to learn it after some time. In fact, right after his conquest of England, William the Conqueror established a council that would become the Parliament. It operated in French for nearly 300 years (AD 1066-1362), and even in the 14th century, this was thought by some to merely be rebellious to the French, with whom they were at war, rather than a permanent change.