Aguaruna is an indigenous American language of the Jivaroan family spoken by about 45,000 Aguaruna people in Peru. The speakers live along the western portion of the Marañón River and also along the Potro, Mayo, and Cahuapanas rivers. Native speakers currently prefer the name Awajún. According to the Ethnologue, there are almost no monolingual speakers; nearly all also speak Spanish. The school system begins with Aguaruna only; as the students progress, Spanish is gradually added. There is a positive outlook and connotation in regard to bilingualism. 60 to 100% are literate and 50 to 75% are literate in Spanish. Huambisa and Achuar-Siwiar are closely related languages. A modest dictionary of the language has been published.
The existence of the voiced plosives [b] and [d] is disputed, they are in free variation with [m] and [n].
Some interpret [ŋ] and [ɰ] as allophones, with [ɰ] appearing at the onset and [ŋ] in the coda. However, both may occur intervocalically. Older speakers may have the allophone [x] for /ŋ/ in word-final position.
Others consider them distinct phonemes, with [ŋ] having the allophone [h̃].
/j/ is written ñ when nasalized due to a following nasal vowel.
^Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2017). "Aguaruna". Glottolog 3.0. Jena, Germany: Max Planck Institute for the Science of Human History.
Adelaar, Willem F.H. with Pieter C. Muysken. (2004) The languages of the Andes (especially section 4.4 The Jivaroan languages). Cambridge: Cambridge University Press.
Asangkay Sejekam, Nexar. (2006). Awajún. Ilustraciones fonéticas de lenguas amerindias, ed. Stephen A. Marlett. Lima: SIL International y Universidad Ricardo Palma. 
Asangkay Sejekam, Nexar. (2006) La situación sociolingüística de la lengua awajún en 2006. Situaciones sociolingüísticas de lenguas amerindias, ed. Stephen A. Marlett. Lima: SIL International and Universidad Ricardo Palma.