The Dhatki Alphabet

In Pakistan, Dhatki is written using a Sindhi-based Perso-Arabic script — an extended form of the standard Urdu Nastaliq alphabet that includes additional letters for implosive and aspirated consonants characteristic of the Thar Desert phonological tradition.

Beyond the standard 32 Perso-Arabic letters (28 Arabic + 4 Persian), the Dhatki/Sindhi script adds letters for implosive consonants (ٻ bilabial implosive, ڏ dental implosive), aspirated stops (ٿ aspirated dental, ڌ aspirated dental), and the retroflex nasal (ڻ). The script is written from right to left.

In India, Dhatki is written using the Devanagari script, while the Mahajani merchant script has also been used historically by trading communities.

Dhatki is primarily spoken across the Thar Desert region, centred on the Tharparkar and Umerkot districts of Sindh province, Pakistan. It is also spoken in the Barmer, Jaisalmer, and Jalore districts of Rajasthan, India, where it is considered endangered.

In Pakistan, Dhatki has approximately 1.8 million speakers, making it a vigorous regional language with a large community across the desert villages and towns of southeastern Sindh. The language is the mother tongue of diverse ethnic communities — Rajasthani, Thari, Sindhi, and Gujarati — united by the shared language of the Thar Desert.

Dhatki belongs to the Western Rajasthani subgroup of the Indo-Aryan branch of the Indo-European language family. Indo-Aryan languages form one of the two major branches of the Indo-Iranian family, alongside the Iranian languages.

Within Rajasthani, Dhatki is most closely related to other varieties spoken across the Thar Desert borderlands of Pakistan and India. It is distinct from Standard Rajasthani and from Sindhi, though heavy contact with Sindhi has left clear phonological marks on Dhatki — most notably the implosive consonants that Dhatki shares with Sindhi but which are absent from other Rajasthani varieties.

Implosive consonants are sounds produced with a simultaneous downward movement of the larynx creating a partial inward airflow — distinct from the outward plosion of ordinary stop consonants. Dhatki has implosive consonants including the bilabial implosive (ٻ) and the dental implosive (ڏ).

These implosive sounds are a defining feature of Sindhi phonology and are highly unusual among Rajasthani languages. Their presence in Dhatki is attributed to intensive and long-standing contact between the Thar Desert communities and Sindhi-speaking populations in the Indus Valley and eastern Sindh.

In the Sindhi-based Perso-Arabic script used for Dhatki in Pakistan, these implosive consonants are written with dedicated letters (ٻ, ڏ) derived from the Sindhi orthographic tradition — letters not found in standard Urdu or Persian writing.

In Pakistan, Dhatki is a relatively vigorous language with approximately 1.8 million speakers concentrated in the Tharparkar and Umerkot districts of Sindh. It is classified as a Developing language (EGIDS 5) by SIL International — meaning it is used for wider communication with some literature but lacks standardisation and official recognition.

In India, Dhatki has far fewer speakers — concentrated in the Barmer and Jaisalmer districts of Rajasthan — and is considered endangered there due to pressure from Hindi and Rajasthani. The boundary location of Dhatki speakers across two countries gives the Pakistani community greater stability while the Indian community faces greater language shift.

The folk song tradition of the Thar Desert — a cherished cultural heritage of the Tharparkar region — continues to sustain Dhatki as a living language of cultural expression among its speakers.

Dhatki and Sindhi are distinct languages belonging to different subgroups of Indo-Aryan — Dhatki to Western Rajasthani and Sindhi to the Sindhi branch. They are not mutually intelligible, and their grammatical structures differ significantly.

However, the long-standing contact between Dhatki-speaking Thari communities and Sindhi-speaking populations in the adjacent Indus Valley has led to notable phonological borrowing. The most striking feature is the adoption of implosive consonants in Dhatki — a hallmark of Sindhi phonology that Dhatki shares but that is absent from geographically more distant Rajasthani varieties.

In Pakistan, the use of a Sindhi-based Perso-Arabic script for Dhatki writing reflects this deep linguistic and cultural connection between the Thar Desert and Sindhi cultural sphere.