Phonology Nilo-Saharan languages present great differences, being a highly diversified group. It has proven difficult to reconstruct many aspects of Proto-Nilo-Saharan. Two very different reconstructions of the proto-language have been proposed by Lionel Bender and Christopher Ehret.
phONoLoGy nilo-sAharan lAngUaGeS prEsent gReat diffeREnCes, bEiNg a hIghly dIVersifIed grOup. IT haS pRoven diFficult tO REcOnstruCt mAnY aSpECTs oF proto-nilo-SahaRan. tWO VeRy diFFereNt rEconsTrucTionS Of ThE pROto-language haVE bEen proposed BY liOnel Bender anD chRistOPher ehRet.