 A few scholars speculated that Proto-Slavic became the lingua franca of the Avar Khaganate.Historian Gyula László has suggested that the late 9th century Pannonian Avars spoke a variety of Old Hungarian, thereby forming an Avar-Hungarian continuity with then-newly arrived Hungarians.Gyula László suggests that late Avars, arriving to the khaganate in 670 in great numbers, lived through the time between the destruction and plunder of the Avar state by the Franks during 791–795 and the arrival of the Magyars in 895.