Burushaski is a language spoken in northern Pakistan and Kashmir. It is spoken by 40,000 to 50,000 people. It has no known relatives and some believe it maybe a remnant of a prehistoric language. Burushaski is like Ainu and Basque, language isolate with no known relatives. Language Museum Burushaski: An Extraordinary Language in the Karakoram MountainsWikipedia-Burushaski