Which language family included Sogdian, an important commercial language of the Silk Road?

Sogdian belonged to the Iranian branch of the Indo-Iranian language family.

Sogdian was spoken in Sogdiana, a region centered on parts of modern Uzbekistan and Tajikistan. Because Sogdian merchants and settlers operated across Central Asia, the language appears in documents from trading communities far from its original homeland.

The language is known from religious manuscripts, administrative records, inscriptions, and the so-called Ancient Letters found near Dunhuang. These sources illuminate commercial partnerships, family concerns, political news, and the multilingual character of Silk Road societies.

Sogdian was not a universal language across all Silk Road routes, and it eventually declined as Arabic, Persian, Turkic languages, and Chinese gained greater importance in different regions. Its descendant, Yaghnobi, survives in a small community in Tajikistan. Sogdian’s historical importance comes from its role in commerce and cultural transmission, not from political control of the whole route.