Atunse gboogi waye lati owo Bennett ati Sterk (1977), Won fi oju lameyito wo awon oro oruko ti o fara jo ara won ninu awon ede wonyi.. 
South Volta-CongoBennett ati Sterk (1977) pe 'South Volta-Congo ní àárín gbùngbùn ariwi Niger-Congo.. 