Berta proper, a.k.a. Gebeto, is spoken by the Berta (also Bertha, Barta, Burta) in Sudan and Ethiopia. As of 2006 Berta had approximately 180,000 speakers in Sudan.[2]
The three Berta languages, Gebeto, Fadashi and Undu, are often considered dialects of a single language. Berta proper includes the dialects Bake, Dabuso, Gebeto, Mayu, and Shuru; the dialect name Gebeto may be extended to all of Berta proper.[3]
If a non-closed vowel sound, /ɛ/ or /ɔ/, are adjacent to a closed vowel sound like /i/ or /u/ within vowel harmony, they are then heard as more closed [e, o].[4]
^Neudorf, Susanne (2016). Phonology of Berta. Dallas, Texas: SIL International.
Bibliography
Torben Andersen. "Aspects of Berta phonology". Afrika und Übersee 76: pp. 41–80.
Torben Andersen. "Absolutive and Nominative in Berta". ed. Nicolai & Rottland, Fifth Nilo-Saharan Linguistics Colloquium. Nice, 24–29 August 1992. Proceedings. (Nilo-Saharan 10). Köln: Rüdiger Köppe Verlag. 1995. pp. 36–49.
M. Lionel Bender. "Berta Lexicon". In Bender (ed.), Topics in Nilo-Saharan Linguistics (Nilo-Saharan 3), pp. 271–304. Hamburg: Helmut Buske Verlag 1989.
E. Cerulli. "Three Berta dialects in western Ethiopia", Africa, 1947.
Susanne Neudorf & Andreas Neudorf: Bertha - English - Amharic Dictionary. Addis Ababa: Benishangul-Gumuz Language Development Project 2007.
A. N. Tucker & M. A. Bryan. Linguistic Analyses: The Non-Bantu Languages of North-Eastern Africa. London: Oxford University Press 1966.
A. Triulzi, A. A. Dafallah, and M. L. Bender. "Berta". In Bender (ed.), The Non-Semitic Languages of Ethiopia. East Lansing, Michigan: African Studies Center, Michigan State University 1976, pp. 513–532.