Chochangachakha language
The Chocha Ngacha language or Chochangachakha (Dzongkha: ཁྱོད་ཅ་ང་ཅ་ཁ་ Wylie: Khyod ca nga ca kha "'You' and 'I' language"; also called "Kursmad-kha", "Maphekha", "rTsamangpa'i kha", and "Tsagkaglingpa'i kha") or Tsamang is a Southern Tibetic language spoken by about 20,000 people in the Kurichu Valley of Lhuntse and Mongar Districts in eastern Bhutan.
Chocha Ngacha and Dzongkha
Chocha Ngacha is a "sister language" to Dzongkha.
Under pressure to assimilate into the mainstream Dzongkha-speaking Ngalop culture, this proximity has resulted in significant loss of its particularly distinctive Kurichu linguistic substrate.
Nicholas Tournadre writes: