Nuer is another Western Nilotic language and Dinka's closest linguistic relative, though I keep reading that the Dinka and Nuer are enemies. This may be due to colonialism rather than an older conflict, though; apparently, the Dinka supported British colonial rule whereas the Nuer did not. This is a song in Nuer by Chuol Nyak. There are at least a few varieties of Nuer, but apparently, there is also at least a written standard. I'm not sure which variety this song is in:
https://www.youtube.com/watch?v=conKxhLVi4I