Sogdian language in the context of "Principality of Ushrusana"

Sogdia (/ˈsɒɡdiə/) or Sogdiana was an ancient Iranian civilization between the Amu Darya and the Syr Darya rivers, and in present-day Uzbekistan, Turkmenistan, Tajikistan, Kazakhstan, and Kyrgyzstan. Sogdiana was also a province of the Achaemenid Empire, and listed on the Behistun Inscription of Darius the Great. Sogdiana was first conquered by Cyrus the Great, the founder of the Achaemenid Empire, and then was annexed by the Macedonian ruler Alexander the Great in 328 BC. It would continue to change hands under the Seleucid Empire, the Greco-Bactrian Kingdom, the Kushan Empire, the Sasanian Empire, the Hephthalite Empire, the Western Turkic Khaganate, and the Muslim conquest of Transoxiana.

The Sogdian city-states, although never politically united, were centered on the city of Samarkand. Sogdian, an Eastern Iranian language, is no longer spoken. However, a descendant of one of its dialects, Yaghnobi, is still spoken by the Yaghnobis of Tajikistan. It was widely spoken in Central Asia as a lingua franca and served as one of the First Turkic Khaganate's court languages for writing documents.

Khwārezmian (Khwarezmian: زڨاک ای خوارزم zəβāg ī xwārazm, *xwārazmānk; also transliterated Khwarazmian, Chorasmian, Khorezmian) is an extinct Eastern Iranian language closely related to Sogdian. The language was spoken in the area of Khwarezm (Chorasmia), centered in the lower Amu Darya south of the Aral Sea (the northern part of the modern Republic of Uzbekistan and the adjacent areas of Kazakhstan and Turkmenistan).

Knowledge of Khwarezmian is limited to its Middle Iranian stage and, as with Sogdian, little is known of its ancient form. Based on the writings of Khwarezmian scholars Al-Biruni and Zamakhshari, the language was in use at least until the 13th century, when it was gradually replaced by Persian for the most part, as well as several dialects of Turkic.

Proto-Iranian or Proto-Iranic is the reconstructed proto-language of the Iranian languages branch of Indo-European language family and thus the ancestor of the Iranian languages such as Persian, Pashto, Sogdian, Zazaki, Ossetian, Mazandarani, Kurdish, Talysh and others. Its speakers, the hypothetical Proto-Iranians, are assumed to have lived in the 2nd millennium BC and are usually connected with the Andronovo archaeological horizon (see Indo-Iranians).

Proto-Iranian was a satem language descended from the Proto-Indo-Iranian language, which in turn, came from the Proto-Indo-European language. It was likely removed less than a millennium from the Avestan language, and less than two millennia from Proto-Indo-European.

The First Turkic Khaganate, also referred to as the First Turkic Empire, the Turkic Khaganate or the Göktürk Khaganate, was a Turkic khaganate established by the Ashina clan of the Göktürks in medieval Inner Asia under the leadership of Bumin Qaghan (d. 552) and his brother Istämi. The First Turkic Khaganate succeeded the Rouran Khaganate as the hegemonic power of the Mongolian Plateau and rapidly expanded their territories in Central Asia. The khaganate became the first Central Asian transcontinental empire from Manchuria to the Black Sea.

Although the Göktürks spoke a Siberian Turkic language, the direct predecessor to the Orkhon Turkic of the Second Turkic Khaganate, the First Khaganate's early official texts and coins were written in Sogdian. It was the first Turkic state to use the name Türk politically. The Old Turkic script was invented in the first half of the sixth century.

Pahlavi is an exclusively written form of various Middle Iranian languages, derived from the Aramaic script. It features Aramaic words used as heterograms (called huzwārišn, "archaisms").

Pahlavi compositions have been found for the dialects/ethnolects of Parthia, Persis, Sogdiana, Scythia, and Khotan. Independent of the variant for which the Pahlavi system was used, the written form of that language only qualifies as Pahlavi when it is both Aramaic-derived and features huzwārišn.

Paul Eugène Pelliot (28 May 1878 – 26 October 1945) was a French sinologist and Orientalist best known for his explorations of Central Asia and the Silk Road regions, and for his acquisition of many important Tibetan Empire-era manuscripts and Chinese texts at the Sachu printing center storage caves (Dunhuang), known as the Dunhuang manuscripts.

A hyperpolyglot, he spoke 13 Oriental languages, including among othersMandarin and Cantonese , Turkish, Russian, Mongolian, Hebrew, Uzbek, Pashto, and Tagalog, as well as Sanskrit, and even rarer languages such as Uyghur, and extinct languages Sogdian, and Tocharian.

Robert Edmond Gauthiot (13 June 1876, Paris – 11 September 1916, Paris) was a French Orientalist, linguist and explorer. Born in Paris, he became, in 1909, a member of the Société Asiatique and met Paul Pelliot. Together, they translated the Sogdian manuscript Vessantara Jataka, found by Pelliot among the Dunhuang manuscripts in Mogao Cave 17.

Gauthiot interrupted his exploration of the Pamir Mountains in July 1914 to return home to serve as a captain in the infantry during World War I. Gauthiot received the Croix de Guerre before he was wounded at the Second Battle of Artois in spring 1915. He died from injuries at Val de Grâce Hospital.

The Manichaean script is an abjad-based writing system rooted in the Semitic family of alphabets and associated with the spread of Manichaeism from southwest to central Asia and beyond, beginning in the third century CE. It is a variant of the Syriac script. It bears a sibling relationship to early forms of the Pahlavi scripts, both systems having developed from the Imperial Aramaic alphabet, in which the Achaemenid court rendered its particular, official dialect of Aramaic. Unlike Pahlavi, the Manichaean script reveals influences from the Sogdian alphabet, which in turn descends from the Syriac branch of Aramaic. The Manichaean script is so named because Manichaean texts attribute its design to Mani himself. Middle Persian is written with this alphabet.

The Iranologist Desmond Durkin-Meisterernst notes that the Manichaean script was mainly used to write numerous Middle Iranian languages (Manichaean Middle Persian, Parthian, Sogdian, Early New Persian, Bactrian) and Old Uyghur (a Turkic language). The Manichaean script is closely related to the Palmyrene alphabet of Palmyrene Aramaic and the Estrangelo script of Syriac.