The Norman conquest of England began on 28 September 1066 with the invasion of the Kingdom of England by the troops of William the Conqueror, Duke of Normandy on 14 October 1066
The English language that is spoken today is the direct result of 1066 and the Norman Conquest. Modern English is vastly different from that spoken by the English prior to the Conquest, both in its word-hoard and its grammar.
The centuries after the Norman Conquest witnessed enormous changes in the English language. In the course of what is called the Middle English period, the fairly rich inflectional system of Old English broke down. It was replaced by what is broadly speaking, the same system English has today, which unlike Old English makes very little use of distinctive word endings in the grammar of the language. The vocabulary of English also changed enormously, with tremendous numbers of borrowings from French and Latin, in addition to the Scandinavian loanwords already mentioned, which were slowly starting to appear in the written language. Old English, like German today, showed a tendency to find native equivalents for foreign words and phrases (although both Old English and modern German show plenty of loanwords), whereas Middle English acquired the habit that modern English retains today of readily accommodating foreign words. Trilingualism in English, French, and Latin was common in the worlds of business and the professions, with words crossing over from one language to another with ease. One only has to flick through the etymologies of any English dictionary to get an impression of the huge number of words entering English from French and Latin during the later medieval period. This trend was set to continue into the early modern period with the explosion of interest in the writings of the ancient world.
