Proto-Indo-Aryan is the reconstructed ancestor of the Indo-Aryan languages. It is believed to have been spoken in Central Asia around 2000 BC.

Tamil is a Dravidian language, while Hindi, Urdu, and Bengali are all Indo-Aryan languages.

The Indo-Aryan languages are believed to have first arrived in India around 1500 BC, brought by the Aryans.

Sanskrit is the oldest Indo-Aryan language, with a history dating back to around 1500 BC.

Hindi is the most widely spoken Indo-Aryan language, with over 500 million speakers worldwide.

Hindi is the national language of India, although it is not the only official language.

Urdu is the national language of Pakistan.

Bengali is the national language of Bangladesh.

Nepali is the national language of Nepal.

Sinhala is the national language of Sri Lanka.

Dhivehi is the national language of the Maldives.

Dzongkha is the national language of Bhutan.

Dari is the national language of Afghanistan.

Tajik is the national language of Tajikistan.

Uzbek is the national language of Uzbekistan.