Middle English is the form of English spoken roughly from the time of the Norman Conquest in 1066 until the end of the 15th century.
For centuries after the Conquest, the Norman kings and high-ranking nobles in England and to some extent elsewhere in the British Isles spoke Anglo-Norman, a variety of Old Norman, originating from a northern langue d'oïl dialect. Merchants and lower-ranked nobles were often bilingual in Anglo-Norman and English, whilst English continued to be the language of the common people. Middle English was influenced by both Anglo-Norman and, later, Anglo-French (see characteristics of the Anglo-Norman language).