Sikkimese Bhutia language
The Sikkimese Bhutia language (Tibetan: འབྲས་ལྗོངས་སྐད་, Wylie: 'bras ljongs skad, THL: dren jong ké, Tibetan pronunciation: [ɖɛ̀n dʑòŋ ké]; 'rice valley language'), or Denjongke, is a Sino-Tibetan language spoken by the Bhutia people of the Indian state of Sikkim and parts of Koshi province in eastern Nepal, and Bhutan. It is one of the official languages of Sikkim.
Source: Wikipedia — Sikkimese Bhutia language (CC BY-SA 4.0)