We have Dinka translators and interpreters. Dinka (natively Thuɔŋjäŋ, Thuɔŋ ee Jieng or simply Jieng) is a Nilotic dialect cluster spoken by the Dinka people, the major ethnic group of South Sudan. There are several main varieties, Padang, Rek, Agaar, Awiel, Twic Mayardit, Hol, Nyarweng, Twi and Bor, which are distinct enough (though mutually intelligible) to require separate literary standards. Jaang, Jieng or Monyjieng is used as a general term to cover all Dinka languages. Rek is the standard and prestige dialect.
The language most related to Dinka is Nuer, the language of the Dinka's traditional rivals. The Luo languages are also closely related. The Dinka vocabulary shows considerable proximity to Nubian, which is probably due to medieval interactions between the Dinka people and the kingdom of Alodia. The Dinka are found mainly along the Nile, specifically the west bank of the White Nile, a major tributary flowing north from Uganda, north and south of the Sudd marsh in southwestern and south central Sudan in three provinces: Bahr el Ghazal, Upper Nile and Southern Kurdufan.
(Courtesy of Dinka Language Wikipedia)