Tocharian languages

The Tocharian (sometimes Tokharian) languages (US: /toʊˈkɛəriənˌ -ˈkɑːr-/ toh-KAIR-ee-ən, -⁠KAR-; UK: /tɒˈkɑːriən/ to-KAR-ee-ən), also known as the Agni-Kuči, Agnean-Kuchean or Kuchean-Agnean languages, are an extinct branch of the Indo-European language family spoken by inhabitants of the Tarim Basin, the Tocharians. The languages are known from manuscripts dating from the 5th to the 8th century AD, which were found in oasis cities on the northern edge of the Tarim Basin (now part of Xinjiang in Northwest China) and the Lop Desert. The discovery of these languages in the early 20th century contradicted the formerly prevalent idea of an east–west division of the Indo-European language family as centum and satem languages, and prompted reinvigorated study of the Indo-European family. Scholars studying these manuscripts in the early 20th century identified their authors with the Tokharoi, a name used in ancient sources for people of Bactria (Tokharistan). Although this identification is now believed to be mistaken, "Tocharian" remains the usual term for these languages.

The discovered manuscripts record two closely related languages, called Tocharian A (also East Tocharian or Turfanian) and Tocharian B (West Tocharian or Kuchean). The subject matter of the texts suggests that Tocharian A was more archaic and used as a Buddhist liturgical language, while Tocharian B was more actively spoken in the entire area from Turfan in the east to Tumshuq in the west. A body of loanwords and names found in Prakrit documents from the Lop Nur basin have been dubbed Tocharian C (Kroränian). A claimed find of ten Tocharian C texts written in Kharosthi has been discredited.

The oldest extant manuscripts in Tocharian B are now dated to the fifth or even late fourth century AD, making it a language of late antiquity contemporary with Gothic, Classical Armenian, and Primitive Irish.

The existence of the Tocharian languages and alphabet was not even suspected until archaeological exploration of the Tarim Basin by Aurel Stein in the early 20th century brought to light fragments of manuscripts in an unknown language, dating from the 6th to 8th centuries AD.

It soon became clear that these fragments were actually written in two distinct but related languages belonging to a hitherto unknown branch of Indo-European, now known as Tocharian:

Prakrit documents from 3rd-century Krorän and Niya on the southeast edge of the Tarim Basin contain loanwords and names that appeared to scholars to come from a closely related language, referred to as Tocharian C. However, this was found to be entirely flawed for the Krorän part (see below, section "Tocharian C"). Recently, a dissertation authored by Niels Schoubben (Leiden University) has demonstrated that all the so-called Tocharian loanwords in Niya Prakrit were, in fact, Bactrian and pre-Bactrian loanwords, or resulted from fundamental misunderstandings of specific words and orthographies. His work definitively put an end to the "Tocharian C" hypothesis.

The discovery of Tocharian upset some theories about the relations of Indo-European languages and revitalized their study. In the 19th century, it was thought that the division between centum and satem languages was a simple west–east division, with centum languages in the west. The theory was undermined in the early 20th century by the discovery of Hittite, a centum language in a relatively eastern location, and Tocharian, which was a centum language despite being the easternmost branch. The result was a new hypothesis, following the wave model of Johannes Schmidt, suggesting that the satem isogloss represents a linguistic innovation in the central part of the Proto-Indo-European home range, and the centum languages along the eastern and the western peripheries did not undergo that change.

Most scholars identify the ancestors of the Tocharians with the Afanasievo culture of South Siberia (c. 3300–2500 BC), an early eastern offshoot of the steppe cultures of the Don-Volga area that later became the Yamnayans. Under this scenario, Tocharian speakers would have immigrated to the Tarim Basin from the north at some later point.