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 correspondence was carried out in Anglo-Norman or Anglo-French from the 13th to the 15th century though its spelling forms were often displaced by continental spellings. Social classes other than the nobility became keen to learn French: manuscripts containing materials for instructing non-native speakers still exist, dating mostly from the late 14th century onwards. Although Anglo-Norman and Anglo-French were eventually eclipsed by modern English, they had been used widely enough to influence English vocabulary permanently. Thus, many original Germanic words, cognates of which can still be found in Nordic, German, and Dutch, have been lost or, as more often occurs, exist