There are some supposals on what the "Tajik" word means. Many Tajiks theirselves, are sure, that the word comes from "taj"-crown. The etymology of the word is still subject of discussions, but according to historical sources, the word appeared after Arabs and Turks, who named as Tajiks local (Iranian) people. In fact, Tajik people might be people of Tash-kurghan (China), who speak their own Sarikoli Language (belongs to East-Iranian language group), or people speaking Wakhi language at upper Hunza, or even Dards from Northern Pakistan. So, it's clear that Tajik means a group of people belong to Iranian race and speaking in different Iranian languages. However, the majority of Tajiks speak in Tajiki - a dialect of Persian, also known as Dari from mid-age literature. There are many dialects of Tajik (Persian) language in Tajikistan. As the process of transforming old local Iranian languages (Bactrian, Sogdian, Scythian, Khorezmian, Parthian and others) into Persian, was very dependent to some historical events. There is a big difference in lexicon and pronunciation. For instance, Tajiks from the North use many of Turkic words, at the same time people from some areas of Badakhshan speak in very archaic dialects, closed to Persian language of 9-10 century (AD). Moreover, dialects (languages) of Badakhshan (both in Tajik and Afghan sides) are so much different, that since 20th century these languages were named as Pamiri languages. There are 3 different language groups in Tajik Badakhshan: Yazgulami (Vanj district), Shughnan-and-Rushan dialects, Wakhi dialects in Ishakshim area and small number of people, speaking in Ryn language (Ishkashim district). An other language - Yaghobi, survived in Yaghnob valley of Fan Mountains.