Fio is an Eastern Beboid language of Cameroon.

• Di Carlo, Pierpaolo (2011). "Lower Fungom linguistic diversity and its historical development: proposals from a multidisciplinary perspective". Africana Linguistica. XVII: 53–100. Retrieved 2024-09-23.
• Ivoline, Budji K. (2015). Spotlight on a Threatened Language: The Fio Language of the Bamenda Grassfields of North western Cameroon (MA thesis). Bamenda: Catholic University of Cameroon.

• List of endangered languages in Africa