Bahasa Indo-Iran

Bahasa Indo-Iran (juga bahasa-bahasa Indo-Iranic
atau bahasa Arya ) merupakan cabang terbesar dan paling tenggara yang masih wujud dalam keluarga bahasa Indo-Eropah.  Mereka mempunyai lebih daripada 1.5 bilion pembesar suara, merentang dari Eropah (Romani), Kurdistan (Kurdi dan Zaza–Gorani) dan Caucasus (Ossetia) ke arah timur ke Xinjiang(Sarikoli) dan Assam (Assam), dan selatan ke Sri Lanka (Sinhala) dan  Maldives (Maldive), dengan cawangan menjangkau sejauh Oceania dan Caribbean untuk Fiji Hindi dan Caribbean Hindustan masing-masing.  Selain itu, terdapat komuniti diaspora besar penutur Indo-Iran di barat laut Eropah (United Kingdom), Amerika Utara (Amerika Syarikat, Kanada), Australia, Afrika Selatan dan Wilayah Teluk Parsi (Emiriah Arab Bersatu, Arab Saudi).

Bahasa

The Indo-Iranian languages consist of three groups: 
 Indo-Aryan/Indic
 Iranian/Iranic
 Nuristani

Indo-Iranian languages are spoken by more than 1.5 billion people. The languages with the most speakers are a part of the Indo-Aryan group: Hindi–Urdu (~590 million as the Indian census often includes Bhojpuri (40 million), Awadhi (40 million), Maithili (35 million), Marwari (30 million), Rajasthani (20 million), Chhattisgarhi (18 million) and Kumaoni (2.1 million) as dialects), Bengali (205 million), Punjabi (100 million), Marathi (90 million), Gujarati (50 million), Odia (35 million), Sindhi (25 million), Assamese (24 million), Sinhala (19 million), Nepali (17 million), and Bishnupuriya (12 million). Among the Iranian branch, major languages are Persian (90 million), Pashto (40 million), Kurdish (35 million), and Balochi (8 million). There are also many smaller languages.