Aghul is a Northeast Caucasian language spoken by the Aghul people, primarily in the Republic of Dagestan, Russia. It belongs to the Lezgic branch of the Northeast Caucasian language family, closely related to other regional languages such as Lezgian and Rutul. The Aghul language is known for its intricate phonetic system and complex grammar, featuring numerous noun cases and verb forms that are typical of the languages in this region.

The Aghul language employs the Cyrillic script for its written form, a change that was standardised during the Soviet era. Despite the influence of Russian as the dominant language in official and educational contexts, Aghul continues to be used in everyday communication within the Aghul community. Preservation efforts include its teaching in local schools and the creation of written materials and media in Aghul, ensuring that the language remains a vital part of the cultural identity of the Aghul people.