Dompo is a recently extinct language of Ghana. Speakers shifted to Nafaanra and Akan. It was spoken adjacent to the main town of the Nafaanra people, namely Banda, Brong-Ahafo Region, Ghana. Blench (2015) reported that it was spoken by 10 households, and by 2020 it had only 6 speakers.
Classification Dompo has numerous parallels with the Gonja language, but according to Blench (1999) does not appear to be directly related to it. Blench suggests three possibilities: it is a Gonja dialect that has come under heavy external influence; it is a related Guang language that has been relexified, largely from Gonja; it is of some other source, and relexified, largely from Gonja. None of the Dompo names for wild plants or animals resemble Gonja, suggesting that the last is the most likely. Some Dompo animal names show resemblances with Mpra.Blench, Roger (2007) Recovering data on Mpra [=Mpre] a possible language isolate in North-Central Ghana
However, Gueldemann (2018) finds the Guang/Gonja connection to be overwhelming:
References
Sources Blench, Roger. 1999. Recent Field Work in Ghana: Report on Dompo and a note on Mpre. Blench, Roger. 2015. The Dompo language of Central Ghana and its affinities.