Literature in Iran
Persian is Iran's official language and the language of the country's ethnic majority (i.e., the Persians), and Persian literature has been the country's most influential literary tradition. Apart from Iran, Persian literature was used and developed further through several medieval Persianate societies in Asia Minor, Central Asia, and South Asia, and the language is still used widely in Central Asia (Tajikistan and Uzbekistan) and Afghanistan.
Elam
The Elamite language may have survived as late as the early Islamic period (roughly contemporary with the early medieval period in Europe). Among other Islamic medieval historians, Ibn al-Nadim, for instance, wrote that "The Iranian languages are Fahlavi (Pahlavi), Dari (not to be confused with Dari Persian in modern Afghanistan), Khuzi, Persian and Suryani (Assyrian)", and Ibn Moqaffa noted that "Khuzi" was the unofficial language of the royalty of Persia, "Khuz" being the corrupted name for Elam.