Eonavian or Galician-Asturian, (official name by Act 1/1998, March 23 of Principality of Asturias) (autonym: eonaviego, gallego-asturiano; Asturian: eonaviegu, gallego-asturianu; Galician: eonaviego, galego-asturiano) is a term used to refer to a set of Romance dialects or falas whose linguistic dominion extends into the zone of Asturias between the Eo and Navia rivers (or more specifically the Eo and Frexulfe rivers). These dialects have been variously classified as the northeastern varieties of Galician, as a linguistic group of its own, or even (less often) as the westernmost varieties of Asturian.

The area where these dialects are spoken includes the Asturian municipalities of Boal, Castropol, Coaña, Eilao, El Franco, Grandas de Salime, Pezós, San Martín de Ozcos, Santalla de Ozcos, Santiso de Abres, Tapia de Casariego, Taramundi, A Veiga, Vilanova de Ozcos, and partially those of Navia, Ibias, Villayón, and Allande.

Other terms used include gallego-asturiano, the official term in Asturias, meaning "Galician-Asturian language", a fala ("the speech", not to be confused with the Fala language of Extremadura) and Galego de Asturias ("Galician language of Asturias"). The term Eonaviego was first used by the linguist Xavier Frías Conde, who translated it as Eonavian in English, Éonavien in French, and Eonavienc in Catalan. In 2007, the Academy of the Asturian Language accepted the denomination of Eonavian to refer to this Galician-Portuguese dialect.

This set of dialects was traditionally included by linguists as Galician-Portuguese, or Galician, with some characteristics of the Astur-Leonese Group. That was the opinion of such linguists as Menéndez Pidal, Eugenio Coseriu, Luís Lindley Cintra, Dámaso Alonso, and more recent ones such as Francisco Xavier Frías Conde and Xoán Babarro. Nowadays, however, there is a political-linguistic conflict on the identity of the language, between those that prioritize the mixed identity of this speech and those that continue to prioritize the Galician substratum. The former, mostly in Asturias, identify Eonavian as a dialect continuum between the Asturian and Galician languages, or even a third language spoken only in that area. The latter, mostly in Galicia, identify it as Galician and request the same protection as is given to Galician in Castile and Leon, that protects the dialects of El Bierzo in cooperation with the Galician Government.

Read more about Galician-Asturian:  Classification, Comparative Table, Phonetic System, Morphological Aspects, Syntax, The Chartulary of The Oscos Abbey, Texts, Literature in Galician-Asturian Language, Association