Proto-Nanno-Pithecian
The Proto-Nanno-Pithecian language (alternatively, Proto-Pygmy-Dwarven) is the largely reconstructed ancestor of the languages spoken by the Pygmy-Dwarven Nannic and Pithecian peoples of the world. While the Nannic and Pithecian peoples are believed to come from the same stock, the split into two distinct phenotypes ("races") is also believed to be quite ancient, thus Proto-Nanno-Pithecian is not believed to be the language of their original united forebearers. Rather, it is believed the language developed in one of the various Nanno-Pithecian communities and split across racial lines gradually while spreading to different Nanno-Pithecian communities.
Real-world explanation: The Proto-Nanno-Pithecian language is the proto-language for a conlang project of CEIGE⟨TAWK⟩'s. It is inspired partially by Khuzdul (LotR) and Khazalid (Warhammer), mostly via exposure to Khazalid placenames. This started due to a long session of playing Total War: WARHAMMER as the Dwarfs, which involves a lot of exploration and consolidation of spread out Dwarven territories. The Proto-Nanno-Pithecian language is intended to make derivation of the two intended daughter languages easier, and provide some depth to an original fantasy backstory, separate to but inspired by the fun experience had forming a Dwarven empire in the above-mentioned game.