Rigwe has highly complex phonology.[5] The presence of the lateral fricative /ɬ/ in Rigwe, unusual among Plateau languages, suggests that there used to be West Chadic languages in the area with this phoneme.[6]
^Rigwe at Ethnologue (18th ed., 2015) (subscription required)
^Blench, Roger (2019). An Atlas of Nigerian Languages (4th ed.). Cambridge: Kay Williamson Educational Foundation.
^"Irigwe (African people)". Library of Congress. Retrieved August 10, 2020.
^"Rigwe". Ethnologue. SIL International. Retrieved August 10, 2020.
^Blench, Roger M. 2018. Nominal affixes and number marking in the Plateau languages of Central Nigeria. In John R. Watters (ed.), East Benue-Congo: Nouns, pronouns, and verbs, 107–172. Berlin: Language Science Press. doi:10.5281/zenodo.1314325
^Blench, Roger (2022). Contact between West Chadic and Plateau languages: new evidence languages: new evidence. 11-12 November 2022, presentation given at Universität Wien.