This was later modified into ' Ekoid languages may to some extent share an origin with some of the A zone languages .
Languages seem to have undergone considerable perturbations ' ( Guthrie 1971 , II : 15 ) .
This was later modified into ' Ekoid languages may to some extent share an origin with some of the A zone languages , but they seem to have undergone considerable perturbations ' ( Guthrie 1971 , II : 15 ) .