One reason it has changed is that French changed is right after the English was form Germany. This happen when Germanic tribes invaded England. By 900 CE people of England spoke Old English.If other country come we learn from them. In 1066 William of Normandy conquered England and French word and Latin origin heavenly influenced the development of English.
From 1150 to 1500 CE people in England spoke Middle English. New word were being spoken and that developed.The introduction of the printing press in the