French is a large minority language and immigrant language in the United Kingdom, with over 300,000 French-born people in the UK. It is also the most popular foreign language. French is spoken and understood by 23% of the UK population.
Modern and Middle English reflect a mixture of Oïl and Old English lexicons after the Norman Conquest of England in 1066, when a Norman-speaking aristocracy took control of a population whose mother tongue was Germanic in origin. As a result of the intertwined histories of England and continental possessions of the English Crown, many formal and legal words from Modern English have French roots. Thus whilst words such as buy and sell are of Germanic origin, purchase and vend are from Old French.
French is an official language in both Jersey and Guernsey. Both use French to some degree, mostly in an administrative or ceremonial capacity. Jersey Legal French is the standardized variety used in Jersey. However, Norman (in its local forms, Guernésiais and Jèrriais) is the historical vernacular of the islands.