Kiranti verbs are not easily segmentable, due in large part to the presence of portmanteau morphemes, crowded affix strings, and extensive (and often nonintuitive) allomorphy.
Historical linguists, as early as 2012, do not consider Kiranti to be a coherent group, but rather a paraphyletic one due to lack of shared innovations.
[4] Independent branches (formerly part of "Western Kiranti") that are unclassified within Trans-Himalayan (Sino-Tibetan): Grollmann (2023) identifies a Khambu subgroup that consists of three languages, Kulung, Nachiring, and Sampang.
[5] Research on proto-Kiranti includes work on phonology and comparative morphology by George van Driem,[6] reconstructions by Michailovsky (1991)[7] and Sergei Starostin 1994.
In addition, he presents a preliminary discussion of the reconstruction of stem alternation and stress patterns on the basis of Khaling and Dumi.