What is "dzongkha"

Dzongkha (; Wylie: rdzong-kha, Roman Dzongkha: Dzongkha), occasionally Ngalopkha ("language of the Ngalop people"), is the national language of Bhutan. The word "dzongkha" means the language (kha) spoken in the dzong "fortresses"—the fortress-like dzong architecture characterises monasteries established throughout Bhutan by its unifier, Ngawang Namgyal, 1st Zhabdrung Rinpoche, in the 17th century.