Dagik language

Dagik, or Dengebu, Dagig, Thakik, Buram, Reikha, is a Niger–Congo language in the Talodi family spoken in the Nuba Mountains in South Kordofan, Sudan. It is 80% lexically similar with Ngile, which is also spoken by the Mesakin people.
The most comprehensive grammar is that of Vanderelst.

Phonology

Consonants

Sounds /p, t̪, t, k/ can have intervocalic allophones as sonorants, and voiced allophones when after nasals.
Sounds only have marginal status.
/r/ can also be heard as a tap allophone.

Vowels

/u/ can also assimilate to a close-mid in different environments.