Although the Ubangian languages are primarily spoken in Central Africa, there are some Ubangian languages spoken in South Sudan as well as in the Democratic Republic of the Congo (DRC). They are called the Sere languages and may form a valid subgroup within Ubangian; they are apparently most closely related to the Ngbaka and Mba subgroups. One of the Sere languages is Belanda Viri a.k.a. Balanda Viri, Belanda, B(v)iri, BGamba, or (Mbe/Mve)gumba. It's closely related to a few of the other languages in a group called Sere-Bviri. This is a song in Belanda Viri, apparently called "Nawinde ne dor sono mbpong mbpa yoo":
https://www.youtube.com/watch?v=PWo81eiOMlY