Ashkun (Âṣkuňu) is a Nuristani language spoken by the Ashkun people – also known as the Âṣkun, Âṣkuňu, Askina, Saňu, Sainu, Yeshkun, Wamas, or Grâmsaňâ – from the region of the central Pech Valley around Wâmâ and in some eastern tributary valleys of the upper Alingar River in Afghanistan's Nuristan Province.

The alternative name Saňu [sɘˈɽ̃u] in Ashkun, denoting a group of people living in Wâmâ, has cognates in other Nuristani languages, such as Kamviri Ćâňu [t͡saˈɽ̃u], Katë Ćâvřu [t͡saˈβɻu], and Prasun Zünyu [zyn̪ˈju].

Ashkun can be split into several dialects spoken in southwestern Nuristan, including Âṣkuňu-veri (Kolâtẫ), Gřâmsaňâ-vīri, Saňu-vīri (Wâmâî), Titin, and Bâźâigal.

The main body of the Âṣkuňu tribe inhabits the Aṣkũgal (Kolâtẫ, Mâsēgal) Valley, which drains southwestward into the Alingar River.

Across a mountain ridge to the east of the Âṣkuňu two tribal groups, each with its own dialect, center on the villages of Wâmâ and Gřâmsaňâgřām (Ačaṇu) off the Pech River.