Sarre Anglo-Saxon cemetery accounts attribute this change to the widescale invasion of Germanic language tribes from northern Europe, namely the Angles, Saxons, and Jutes. Archaeological and toponymic evidence shows that there was a great deal of syncretism, with Anglo-Saxon culture interacting and mixing with the Romano-British culture. The Old English term "Kent" first appears in the Anglo-Saxon period, and was based on the earlier Celtic-language name "Cantii". Initially applied only to the area east of the River Medway, by the end of the sixth century it also referred to areas to the west of it. The Kingdom of Kent was the first recorded
Anglo-Norman language century, Latin was the language of all official written documents. Nevertheless, some important documents had their official Norman translation, such as the Magna Carta signed in 1215. The first official document written in Anglo-Norman was a statute promulgated by the king in 1275. Thus, from the 13th century, Anglo-Norman became used in official documents, such as those that were marked by the private seal of the king whereas the documents sealed by the Lord Chancellor were written in Latin until the end of the Middle Ages. English became the language of Parliament and of legislation in the 15th century, half