http://en.wikipedia.org/wiki/Scythian_languages
Saka language or Scytho-Khotanese in the east: spoken in the Kingdom of Khotan (located in present-day Xinjiang, China), and including the Khotanese of Khotan and Tumshuqese of Tumshuq. Scholars classify these languages as part of the North-Eastern branch of Iranian languages.
http://en.wikipedia.org/wiki/Saka_language
Saka is an extinct Iranian language which was spoken in Xinjiang, China. There are two known dialects, identified with the cities of Khotan and Tumxuk. Many Prakrit terms were borrowed from the Khotan dialect of Saka into the Tocharian languages.[1]