Religious Music in Bhutan
The Bhutanese was first of all united in the 17 th century, during the time of Shabdrung Ngawang Namgyal from the year 1594 to 1652; ...

https://worldhitz4u.blogspot.com/2013/12/religious-music-in-bhutan.html
The
Bhutanese was first of all united in the 17th century, during the
time of Shabdrung Ngawang Namgyal from the year 1594 to 1652; the same time saw
a great growing of the traditional music and dance. The religious music is
usually sung, and its lyrics and dance are often re-enacting namtars, spiritual
biographies of saints, and the features distinctive masks and costumes.
en.wikipedia.org
Now,
Bhutan has a robust tradition of monastic song and music not normally heard by
the general public, the language used in these lyrics is generally choke.