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.
Persian and Urdu
The Persian language historically influenced many of the modern languages and dialects of the Middle East, Central Asia, Eastern Europe, and South Asia including the standard register Urdu, the national language of Pakistan and an official language in seven states/territories of India. The relationship extends back to around the 3rd millennium BCE, as they both descend from the Proto-Indo-Iranian language.