Catford se imo aayan-ogbufo onitiori nipa iwoye linguisiiki.Ni gbedeke  1960s ati ni ibere1970, onimo orile-ee Czech ti o n je Jiri Levy ati awon ti ile Anton Popovic ati Frantisek Miko sise lori imo isowolo-ede aayan-ogbufo ajemolitireso.Awon itokasi.. 
Awon Egba je eka eya Yoruba ni apa iwo-oorun ile Naijiria, opo ninu won ni won wa lati aarin ipinle Ogun ti i se Ogun Central Senatorial District.Apapo ijoba ibile mefa ni o parapọ̀ di ogun Central Senatorial District ni IpinleOgun Ogun.. 