In looking for research that explores the challenges of ethnic federalism and language in Ethiopia, I came across the book "Education, Politics and Social Change in Ethiopia" (2010), edited by Paulos Milkias (Concordia University) and Messay Kebede (University of Dayton). All of the contributing authors are based outside of Ethiopia, which is not necessarily negative, but I think it would have been a useful addition to have people more actively engaged in the Ethiopian education and political systems contribute. The book covers a range of topics: English as a medium of instruction, traditional and modern education, influences of western education, history of education, an Ethiopian theory of education, education and the Pentecostal movement, language politics, women and education, and power of educating.
I support the linguistic arguments made by Ngugi wa Thiong'o, and found Tekeste Negash's work (Chapter 1) an interesting read. While Ethiopia does not have a colonial legacy, it has adopted a colonial language for its primary medium of instruction: "The problem with English as a medium of instruction is even more complex. English is not only a language but it is a value system. Attending all classes in English is tantamount to the whole sale adaptation of the culture that the English language represents at the price of one's native language and the values such language contains." (p. 19) Recently, Ethiopia opted for dual language instruction (Afan Oromo and Amharic) in federal jurisdictions (Addis Ababa and Dire Dawa), which Tekeste suggested when this book was published in 2010: "I believe it is imperative that Ethiopia makes the transition from English into Amharic and Afan-Oromo by about 2025. To some readers of this paper, twenty years may sound a very long time; but 20 to 25 years is just enough to discuss the issue of the benefits of connecting to ones world view and of initiating the process of translation and reinterpretation of school materials as well the development of both languages." (p. 23).