|Native to||Myanmar, Bangladesh|
|Region||Northwestern Rakhine State|
Cak is spoken in Bangladesh by about 3,000 people and in Rakhine State, Burma by about 1,000 people according to Ethnologue. In Bangladesh, Cak is spoken in Baishari, Naikhyongchari, and Dochari (Huziwara 2018). In Rakhine State, Burma, Sak is spoken in Maungdaw, Buthidaung, Rathedaung, and Mrauk U townships (Huziwara 2018). The Baishari dialect is the most conservative one (Huziwara 2018).
According to Ethnologue, in Bangladesh, Chak is spoken in 14 villages in:
- Chittagong Division: Baishari, Bandarban, Bishar Chokpra
- south Naikhongchari area in the Arakan Blue Mountains
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- Huziwara, Keisuke. 2002. “Chakku-go no onsei ni kansuru koosatu” [A phonetic analysis of Cak]. Kyoto University Linguistic Research [Kyooto Daigaku Gengogaku Kenkyuu] 21:217–73.
- Huziwara, Keisuke. 2008. Chakku-go no kizyutu gengogakuteki kenkyuu [A descriptive linguistic study of the Cak language]. Doctoral dissertation, Kyoto University. lix + 942 pp.
- Huziwara, K. (2008). Cak numerals. The Dhaka University Journal of Linguistics, 1(2), 1-10. Retrieved February 12, 2016, 
- Huziwara, Keisuke. 2010. “Cak prefixes.” In Dai Zhongming and James A. Matisoff, eds., Zang-Mian-yu yanjiu sishi nian [Forty Years of Sino-Tibetan Studies], pp. 130–45. Harbin: Heilongjiang University Press.
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- Sak at Ethnologue (18th ed., 2015)
- Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2017). "Luish". Glottolog 3.0. Jena, Germany: Max Planck Institute for the Science of Human History.
- Huziwara, Keisuke (2018). Varieties of Cak dialects. Paper presented at the 28th Annual Meeting of the Southeast Asian Linguistics Society, held May 17-19, 2018 in Kaohsiung, Taiwan.