Vasi-vari is a language

Language

Language may refer either to the specifically human capacity for acquiring and using complex systems of communication, or to a specific instance of such a system of complex communication...

 spoken by the Vasi in a few villages in the Prasun Valley in Afghanistan

Afghanistan

Afghanistan , officially the Islamic Republic of Afghanistan, is a landlocked country located in the centre of Asia, forming South Asia, Central Asia and the Middle East. With a population of about 29 million, it has an area of , making it the 42nd most populous and 41st largest nation in the world...

. The most used alternative names are Prasuni or Prasun, which derive from Pashto

Pashto language

Pashto , known as Afghani in Persian and Pathani in Punjabi , is the native language of the indigenous Pashtun people or Afghan people who are found primarily between an area south of the Amu Darya in Afghanistan and...

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Vasi-vari belongs to the Indo-European

Indo-European languages

The Indo-European languages are a family of several hundred related languages and dialects, including most major current languages of Europe, the Iranian plateau, and South Asia and also historically predominant in Anatolia...

 language family

Language family

A language family is a group of languages related through descent from a common ancestor, called the proto-language of that family. The term 'family' comes from the tree model of language origination in historical linguistics, which makes use of a metaphor comparing languages to people in a...

, and is on the Nuristani

Nuristani languages

The Nuristani languages are one of the three groups within the Indo-Iranian language family, alongside the much larger Indo-Aryan and Iranian groups. They are spoken primarily in eastern Afghanistan...

 group of the Indo-Iranian

Indo-Iranian languages

The Indo-Iranian language group constitutes the easternmost extant branch of the Indo-European family of languages. It consists of three language groups: the Indo-Aryan, Iranian and Nuristani...

 branch.

Its speakers have been estimated at 1,000 (2000) and are 100% Muslim

Muslim

A Muslim, also spelled Moslem, is an adherent of Islam, a monotheistic, Abrahamic religion based on the Quran, which Muslims consider the verbatim word of God as revealed to prophet Muhammad. "Muslim" is the Arabic term for "submitter" .Muslims believe that God is one and incomparable...

. Literacy rates are low: below 1% for people who have it as a first language

First language

A first language is the language a person has learned from birth or within the critical period, or that a person speaks the best and so is often the basis for sociolinguistic identity...

, and between 15% and 25% for people who have it as a second language

Second language

A second language or L2 is any language learned after the first language or mother tongue. Some languages, often called auxiliary languages, are used primarily as second languages or lingua francas ....

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Vasi-vari is the most isolated of the Nuristani languages

Nuristani languages

The Nuristani languages are one of the three groups within the Indo-Iranian language family, alongside the much larger Indo-Aryan and Iranian groups. They are spoken primarily in eastern Afghanistan...

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