The English kings lose the duchy of Normandy to French kings. England is now the only home of the Norman English. 1205 First book in English appears since the conquest. 1258 First royal proclamation issued in English since the conquest. Increasing feeling on the part of even noblemen that they are English, not French.
Nobility begin to educate their children in English.
French is taught to children as a foreign language rather than used as a medium of instruction. 1337 Start of the Hundred Years' War between England and France. English becomes official language of the law courts. More and more authors are writing in English. 1380 Chaucer writes the Canterbury tales in Middle English.