 However, if it did exist as a distinct dialect group, it has not survived extensively enough for diagnostic features to be detected, despite much new subliterary Latin being discovered in England in the 20th century.It is not known when Vulgar Latin ceased to be spoken in Britain, but it is likely that it continued to be widely spoken in various parts of Britain into the 5th century.In the lowland zone, Vulgar Latin was replaced by Old English during the course of the 5th and the 6th centuries, but in the highland zone, it gave way to Brittonic languages such as Primitive Welsh and Cornish.