Indo‑Iranian languages

Classification and main branches

Traditionally the family is divided into three branches: Indo‑Aryan (sometimes called Indic), Iranian (often written Iranic), and Nuristani. The first two are by far the largest and best documented. Modern Indo‑Aryan languages include Hindi, Urdu, Bengali, Punjabi, Marathi and others; Iranian languages include Persian (Farsi/Dari/Tajik), Kurdish, Pashto, Balochi and several Central Asian varieties.

Linguistic characteristics

Indo‑Iranian languages share features inherited from their common ancestor, Proto‑Indo‑Iranian, and show several distinctive developments: a tendency toward the satem reflexes of Proto‑Indo‑European palatovelars, complex inflectional systems in older stages (cases, tense/aspect marking), and innovations in phonology and morphology that separate them from other branches. Many languages also display areal features such as retroflex consonants, especially in South Asia.

History and development

Reconstructed evidence and ancient texts place early Indo‑Iranian speech communities in the steppes and forest‑steppe zones east and north of the Caspian Sea before spreading south and southeast. Texts such as Vedic Sanskrit and Avestan record early stages of Indo‑Aryan and Iranian speech. Over the first millennium BCE and the first millennium CE these groups diversified, migrated, and gave rise to the modern language map of South Asia, Iran and adjacent areas.

Writing systems and examples

• Indo‑Aryan languages are often written in scripts derived from Brahmi, including Devanagari and regional variants.
• Many Iranian languages use Perso‑Arabic scripts or Cyrillic adaptations (as in Tajik), and other local orthographies.
• Classical examples include Vedic Sanskrit (Indo‑Aryan) and Avestan and Old Persian (Iranian).

Importance and notable facts

Indo‑Iranian languages have had enormous literary, religious and cultural influence: Vedic literature shaped South Asian traditions, while Persian literature and administrative use shaped large parts of the Middle East and South Asia. The branch contains both some of the most widely spoken languages in the world and many smaller, vulnerable languages. For further classification details see entries on Indo‑Aryan (Indic), surveys of the Central Asian homeland and resources about the Indian subcontinent and Iranian plateau. Historical notes on early locations are discussed near the Caspian Sea region and in overviews of the language family.