Sak language

Sak (also known as Cak, Chak, or Tsak) is a Sino-Tibetan language of the Sal branch spoken in Bangladesh and Myanmar by the Chak people.

Geographical distribution
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
 * Southern Naikhongchari area in the Arakan Blue Mountains

Consonants

 * Sounds /tsʰ, kʰ, w/ mainly occur from loanwords.
 * /ts, tsʰ, dz/ is also heard as [tʃ, tʃʰ, dʒ] among other dialects.
 * [ɲ] occurs as a realization of the consonant sequence /ŋj/.

Vowels

 * [ə] only occurs in minor syllables or as a result of vowel reduction of /a/.

Numerals
Sak uses a decimal-based numeral system. Sak uses two sets of numerals: an indigenous system, and another system borrowed from Arakanese, often used for numbers beyond ten.