Tajik, or Tajiki, Tajik Persian, Tajiki Persian (sometimes written Tadjiki or Tadzhiki or Forsii Tojiki; Тоҷикӣ, Форсии Тоҷикӣ, تاجیکی‎, فارسی تاجیکی‎, Тocikī [tɔːdʒɪˈkiː]) a Southwestern Iranian language that is genetically closely related to such major languages as Persian and Dari. It is considered a variety of the Persian language.