Between the Bodic and Tani areas lie many almost completely undescribed and unclassified languages, which, speculatively considered Tibeto-Burman, exhibit many unique structural and lexical properties that probably reflect both a long history in the region and a complex history of language contact with neighbouring populations. Among them are Sherdukpen, Bugun, Hruso, Koro, Miji, Bangru and Puroik/Sulung. The high linguistic significance these languages is belied by the extreme paucity of documentation and description of them, even in view of their highly endangered status.