I read this amazing paper - African Languages and African Literature Cecilia A. Eme & Davidson U. Mbagwu DOI: http://dx.doi.org/10.4314/ujah.v12i1.7
My argument is this: I strongly think that every African author is an individual with their own aspirations. Why would any author go through the pains of learning to write in African languages when they have a rich language like English for their stories?
I strongly think African authors are trying to do the work of the anthropologist. A novelist's job is to entertain his readers with interesting fictional events. I have never seen British authors coming together to write in old Shakespearian English collectively. That kind of English is lost and remains in old literature. Why should African languages be an exception? If we wish to preserve our languages in written form, let Historians and anthropologists do the job, not novelists.