The Kadu languages, also known as Kadugli–Krongo or Tumtum, are a small language family of the Kordofanian geographic grouping, once included in Niger–Congo. However, since Thilo Schadeberg (1981), Kadu is widely seen as Nilo-Saharan. Evidence for a Niger-Congo affiliation is rejected, and a Nilo-Saharan relationship is controversial. A conservative classification would treat the Kadu languages as an independent family.[1]
Classification
Blench (2006) notes that Kadu languages share similarities with multiple African language phyla, including Niger-Congo and Nilo-Saharan, suggesting a complex history of linguistic convergence and contact.[2] However, more recently, Blench states that Kadu is almost certainly Nilo-Saharan, with its closest relationship being with Eastern Sudanic.[3][4]
Like the Nilotic, Surmic, and Kuliak languages, Kadu languages have verb-initial word order. However, most other languages of the Nuba Mountains, Darfur, and the Sudan-Ethiopia border region have verb-final word order.[5]
Dafalla (2000) compares 179 cognates in Kadugli, Kamda, Kanga, Katcha, Keiga, Kufa, Miri, Shororo-Kursi, and Tulishi. Dafalla's (2000) results are similarly to those of Schadeberg (1989).
Reconstructions
Some Kadu quasi-reconstructions by Blench (2006):[8]
^Güldemann, Tom (2018). "Historical linguistics and genealogical language classification in Africa". In Güldemann, Tom (ed.). The Languages and Linguistics of Africa. The World of Linguistics series. Vol. 11. Berlin: De Gruyter Mouton. pp. 58–444. doi:10.1515/9783110421668-002. ISBN978-3-11-042606-9. S2CID133888593.
^Hall, Marian and Hall, Edward. 2004. Kadugli-Krongo. Occasional Papers in the Study of Sudanese Languages 9. 57–68. Entebbe: Summer Institute of Linguistics Sudan.
^Schadeberg, Thilo C. 1987. Kordofanian. In The Niger-Congo languages, ed. by John Bendor-Samuel, pp. 66–80. Lanham: University Press of America.
Dafalla, Rihab Yahia. 2000. A Phonological Comparison of the Katcha Kadugli Language Groups in the Nuba Mountains. M.A. Dissertation, University of Khartoum.