2-651: Standard Persian ( Persian : فارسی معیار ) is the standard variety of Persian that is the official language of Iran and Tajikistan and one of the two official languages of Afghanistan . It is a set of spoken and written formal varieties used by the educated persophones of several nations around the world. As Persian is a pluricentric language , Standard Persian encompasses various linguistic norms (consisting of prescribed usage ). Standard Persian practically has three standard varieties with official status in Iran , Afghanistan , and Tajikistan . The standard forms of
4-630: The three are based on the Tehrani , Kabuli , and Bukharan varieties, respectively. The Persian alphabet is used for both Farsi (Iranian) and Dari (Afghan). Traditionally, Tajiki is also written with Perso-Arabic script . In order to increase literacy, a Latin alphabet (based on the Common Turkic Alphabet ) was introduced in 1917. Later in the late 1930s, the Tajik Soviet Socialist Republic promoted
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