Tani languages

The Tani language, often referred to as Tani languages, encompasses a group of closely related languages spoken by the Tani people in the northeastern region of India, primarily in the state of Arunachal Pradesh and Assam. These languages belong to the Sino-Tibetan family and include several major dialects such as Nyishi, Galo, Apatani, Adi, Tagin, and Mising.

Background
The Tani languages are spoken by about 2,170,500 people of Arunachal Pradesh, including the Adi, Apatani, Galo, Mising, Nyishi, Tagin, and of the East Kameng, West Kameng, Papumpare, Lower Subansiri, Upper Subansiri, West Siang, East Siang, Upper Siang, Lower Dibang Valley and Lohit districts of Arunachal Pradesh and Dhemaji, North Lakhimpur, Sonitpur, Majuli etc. districts of Assam. In Arunachal Pradesh alone the Tani-speaking area covers some 40,000 square kilometers, or roughly half the size of the state. Scattered Tani communities spill over the Sino-Indian border into adjacent areas in Mêdog (Miguba people), Mainling (Bokar and Tagin peoples), and Lhünzê (Bangni, Na, Bayi, Dazu, and Mara peoples) counties of Tibet.

The name Tani was originally suggested by Jackson Tianshin Sun in his 1993 doctoral dissertation.

Classification
The Tani languages are conservatively classified as a distinct branch in Sino-Tibetan. Their closest relatives may be their eastern neighbors the Digaro languages, Taraon and Idu; this was first suggested by Sun (1993), but a relationship has not yet been systematically demonstrated. Blench (2014) suggests that Tani has a Greater Siangic substratum, with the Greater Siangic languages being a non-Sino-Tibetan language family consisting of Idu-Taraon and Siangic languages.

Mark Post (2015) observes that Tani typologically fits into the Mainland Southeast Asia linguistic area, which typically has creoloid morphosyntactic patterns, rather than with the languages of the Tibetosphere. Post (2015) also notes that Tani culture is similar to those of Mainland Southeast Asian hill tribe cultures, and is not particularly adapted to cold montane environments.

A provisional classification in Sun (1993), who argued that Tani is a primary branch of Tibeto-Burman (within Sino-Tibetan), is:


 * Tani
 * Eastern Tani (Adi/Abor)
 * ?Damu
 * Bori
 * Mishing ( Plains Miri) – Padam (Bor Abor) – Minyong
 * Bokar (incl. Palibo & Ramo)
 * Western Tani
 * Apatani ( Tani)
 * Nishi
 * Nishi ( E. Dafla, Nishing; possibly including Nyisu, Yano), Tagin ( W. Dafla), Bangni ( Na), Hill Miri ( Sarak), ?Gallong ( Duba, Galo)

To Eastern Tani, van Driem (2008) adds the following possible languages:
 * Tangam

Milang has traditionally been classified as a divergent Tani language, but in 2011 was tentatively reclassified as Siangic (Post & Blench 2011).

Proto-Tani was partially reconstructed by Sun (1993). A large number of reconstructed roots have cognates in other Sino-Tibetan languages. However, a great deal of Proto-Tani vocabulary have no cognates within Sino-Tibetan (Post 2011), and most Tani grammar seems to be secondary, without cognates in grammatically conservative Sino-Tibetan languages such as Jingpho or the Kiranti languages (Post 2006). Post (2012) suggests that Apatani and Milang have non-Tani substrata, and that as early Tani languages had expanded deeper into Arunachal Pradesh, mixing with non-Tani languages occurred.

Mark Post (2013) proposes the following revised classification for the Tani languages.


 * Tani
 * ?Milang
 * Eastern Tani
 * Bori
 * Siang (Adi)
 * Minyong
 * Mising
 * Pasi
 * Padam
 * Bokar
 * Pre-Western Tani
 * Tangam, Damu?
 * Western Tani
 * Apatani
 * Subansiri
 * Bangni-Tagin
 * Nyishi–Hill Miri
 * Galo
 * Lare
 * Pugo

The undocumented Ashing language presumably belongs here.

However, Macario (2015) notes that many Apatani words are closer to reconstructions of Proto-Tibeto-Burman (Matisoff 2003) than to Proto-Tani (Sun 1993). Possible explanations include Apatani having a substratum belonging to an extinct Tibeto-Burman branch or language phylum, or linguistic variation in Proto-Tani.

Isoglosses
Sun (1993: 254-255) lists the following 25 lexical isoglosses between Western Tani and Eastern Tani.

Unified writing script
A new alphabetical writing system for Tani languages was invented by Tony Koyu, a social scientist from Itanagar, Arunachal Pradesh. It was first presented at a seminar at the North Eastern Regional Institute of Science and Technology at Nirjuli, Arunachal Pradesh in November 2001. It is not related to any other writing system, but some of the letters are similar to Bengali or Latin letters.

This script however has also received significant criticism. One major point of contention is the claim that it is not truly indigenous but rather heavily derived from the Devanagari script. Critics argue that its very name, "Lipi," is a Hindi term, which casts doubt on its authenticity as an original script. Additionally, Tani Lipi does not account for the tonal nature of the Tani languages, which is a critical feature for accurate representation and pronunciation.

Furthermore, Tani Lipi is often criticized for its limited applicability, as it primarily suits the Galo language, that too only in limited settings and does not adequately serve the diverse Tani linguistic group. This limitation hinders its broader acceptance and usefulness across the different Tani-speaking communities. These criticisms underscore the challenges in creating a unifying script for a linguistically diverse group while ensuring it retains cultural authenticity and practical utility.