Burushaski

Burushaski is a language isolate unrelated to any other languages.
It is spoken by about 50,000 people in the Hunza and Yasin valleys
in northern Pakistan and Kashmir. A different dialect of the
language is spoken in each of the valleys, though they are largely
mutually intelligible. The language is also known as Biltum,
Brushaski, Burucaki, Burucaski, Burushaki, Burushki, Khajuna or Kunjut.

Until recently, Burushaski was rarely written. A number of texts
have been written by native speakers for researchers using a version
of the Urdu alphabet. The International Phonetic Alphabet (IPA) and the
Roman alphabet have also been used to write texts in the language.