Kawésqar (Qawasqar), also known as Alacaluf, is a critically endangered Alacalufan language spoken in southern Chile by the Kawésqar people. Originally part of a small family, only the northern language remains. In 2009, only a handful of elderly people spoke the language, most of whom lived on Wellington Island off the southwest coast of Chile.

The alphabet in use has the following letters: a, æ, c, cꞌ, e, f, h, i, j, k, kꞌ, l, m, n, o, p, pꞌ, q, r, rr, s, t, tꞌ, u, w, x. However, differences are reported between dialects, and some sounds are not represented.

Kawésqar has a complex system of grammatical tense, which includes a basic morphological contrast between future, present, immediate past, recent past, distant past, and mythological past events.