Choca-ngaca or Chocangacakha (Dzongkha: ཁྱོད་ཅ་ང་ཅ་ཁ་; Wylie: Khyod-ca-nga-ca-kha; also called "Kursmadkha," "Maphekha," "Rtsamangpa'ikha," and "Tsagkaglingpa'ikha") or Tsamang is a Southern Tibetan language spoken by about 20,000 people in the Kurichu Valley of Lhuntse and Mongar Districts in eastern Bhutan.
Some of the villages of traditional 'kushitara' weavers, linked with the royal family of Bhutan, are found in the Kuri Chhu valley near Mongar.
It contains headwaters of four major river systems: Punatsang Chhu, Mangde Chhu, Chamkhar Chhu, and Kuri Chhu.
Kuri Chhu | Abd al Kuri | Aabaar Bochhor Kuri Pore | Mangde Chhu | Drangme Chhu |