Pitjantjatjara (/pɪtʃəntʃəˈtʃɑːrə/ pih-chən-chə-CHAR-ə; Pitjantjatjara: [ˈpɪɟanɟaɟaɾa] or [ˈpɪɟanɟaɾa]) is a dialect of the Western Desert language traditionally spoken by the Pitjantjatjara people of Central Australia. It is mutually intelligible with other varieties of the Western Desert language, and is particularly closely related to the Yankunytjatjara dialect. The names for the two groups are based on their respective words for 'come/go.'

Pitjantjatjara is a relatively healthy Aboriginal language, with children learning it. It is taught in some Aboriginal schools. The literacy rate for first language speakers is 50–70%; and is 10–15% for second-language learners. There is a Pitjantjatjara dictionary, and the New Testament of the Bible has been translated into the language, a project started at the Ernabella Mission in the early 1940s and completed in 2002. Work continues on the Old Testament.

The Ernabella Mission was established by Charles Duguid and the Presbyterian Church of Australia in 1937 at the location now known as Pukatja, supported by the South Australian government. The Mission aimed to keep the language and culture alive, with the missionaries learning the language themselves and teaching it in the school as well as delivering sermons in it. This meant that the language became a written language for the first time, and the people became literate in their own language before English.

The first draft of the New Testament's Gospel of Mark, Tjukurpa Palja Markaku, was completed in 1945 by Reverend Bob Love and Ronald Trudinger at the Mission, and was published by the British and Foreign Bible Society in 1949. Work continued over the next 20 years, with publication of a shorter New Testament in 1969 by the Bible Society Australia. Pitjantjatjara Bible Translation Project, incorporated in 1981, completed a new translation of the New Testament and about 15% of the Old Testament, first published in 2002. In 2011 a new project to translate the rest of the OT was initiated, as of 2019^[update] working on various OT books. Paul Eckert, a 21st-century Bible Society missionary and local teacher since 1973, has worked with elders on the project for many years. The Book of Daniel was published in 2015, and the Pitjantjatjara version of the New Testament is available online.

In 2017 members of the Pitjantjatjara Bible Translation Project and partners began a multi-voice recording of the Pitjantjatjara New Testament, with 50% completed by 2017.

APY lands schools taught a bilingual curriculum until the late 1980s, when the programs were defunded, and teaching reverted to English only. In December 2018 it was announced that the South Australian Government would commit to teaching in the Pitjantjatjara and Yankunytjatjara languages, with English as an additional language, by 2029.

Pitjantjatjara includes several loan words from other languages, predominantly from English.

Some older loan words are derived from other Indigenous languages and from English, while newer loan words are almost entirely borrowed from English.