As a written language, Old Persian is attested in royal Achaemenid inscriptions. The oldest known text written in Old Persian is from the Behistun Inscription, dating to the time of King Darius I (reigned 522–486 BC). Examples of Old Persian have been found in what is now Iran, Romania (), Armenia, Bahrain, Iraq, Turkey, and Egypt. Old Persian is one of the oldest Indo-European …

Medieval Iranian scholars such as Abdullah Ibn al-Muqaffa (8th century) and Ibn al-Nadim (10th century) associated the term "Dari" with the eastern province of Khorasan, while they used the term "Pahlavi" to describe the dialects of the northwestern areas between Isfahan and Azerbaijan, and "Pârsi" ("Persian" proper) to describe the dialects of Fars (Persia).

Fars Province (/ f ɑːr s /; Persian: استان فارس, Ostān-e Fārs, pronounced [ˈfɒː(ɾ)s]), also known as Pars Province (استان پارس, Ostān-e Pārs) as well as Persis and Persia, is one of the thirty-one provinces of Iran.With an area of 122,400 km², it is located in Iran's southwest, in Region 2, and its administrative center is Shiraz.

Khuzestan Province (also spelled Xuzestan; Persian: استان خوزستان Ostān-e Xūzestān) is one of the 31 provinces of Iran.It is in the southwest of the country, bordering Iraq and the Persian Gulf.Its capital is Ahvaz and it covers an area of 63,238 square kilometres (24,416 sq mi). Since 2014, it has been part of Iran's Region 4.

Danish is a Germanic language of the North Germanic branch.Other names for this group are the Nordic or Scandinavian languages. Along with Swedish, Danish descends from the Eastern dialects of the Old Norse language; Danish and Swedish are also classified as East Scandinavian or East Nordic languages.. Scandinavian languages are often considered a …

Iran's population increased dramatically during the later half of the 20th century, reaching about 80 million by 2016. As of 2022, Iran's population is around 86.5 million. In recent years, however, Iran's birth rate has dropped significantly. Studies project that Iran's rate of population growth will continue to slow until it stabilises above 100 million by 2050.

Mongolian is the official language of Mongolia and both the most widely spoken and best-known member of the Mongolic language family.The number of speakers across all its dialects may be 5.2 million, including the vast majority of the residents of Mongolia and many of the ethnic Mongol residents of the Inner Mongolia Autonomous Region of the People's Republic of China.

Old Persian is one of the two directly attested Old Iranian languages (the other being Avestan) and is the ancestor of Middle Persian (the language of Sasanian Empire).Like other Old Iranian languages, it was known to its native speakers as ariya (Iranian).. Old Persian appears primarily in the inscriptions, clay tablets and seals of the Achaemenid era (c. 600 BCE to 300 BCE).

Central Kurdish (کوردیی ناوەندی), also called Sorani (سۆرانی), is a Kurdish dialect or a language that is spoken in Iraq, mainly in Iraqi Kurdistan, as well as the provinces of Kurdistan, Kermanshah, and West Azerbaijan in western Iran.Sorani is one of the two official languages of Iraq, along with Arabic, and is in administrative documents simply referred to as "Kurdish".

Name. Up to and including the nineteenth century, speakers in Afghanistan and Central Asia had no separate name for the language and simply regarded themselves as speaking Farsi, which is the endonym for the Persian language. The term Tajik, derived from the Persian for "foreigner", was an exonym used by Turkic speakers to refer to Persian speakers (the word Tat has a …