A revived language is one that, having experienced near or complete language extinction as either a spoken or written language, has been intentionally revived and has regained some of its former status. The most frequent reason for extinction is the marginalisation of local languages within a wider dominant nation state, which might at times amount to outright political oppression. This process normally works alongside economic and cultural pressures for greater centralisation and assimilation. Once a language has become marginalised in this way, it is often perceived as being "useless" by its remaining speakers, who associate it with low social status and poverty, and consequently fail to pass it on to the next generation. Aboriginal Australian languages A great number of the original more than 250 Aboriginal Australian languages, which include around 800 dialects, have become extinct or nearly extinct since colonization. Since the late 20th century there have been efforts to revive many of these. The national project known as First Languages Australia has supported 39 of these under its Priority Languages Support Project, commissioned by the Federal Government. This project supports other language projects around the country as a funding body. The Mobile Language Team in South Australia lists 46 languages or dialects on its website , including Ngarrindjeri, Kaurna, Kokatha, Lower Arrernte and Pitjantjatjara, to name a few of the many languages on which it is working. Some of the languages being revived across the country are: Barngarla (Parnkalla, Banggarla), the language of the Barngarla people on the Eyre Peninsula, South Australia. It is being revived by Ghil'ad Zuckermann (University of Adelaide) and the Barngarla community, based on 170-year-old documents. Diyari is spoken in the far north of South Australia, to the east of Kati Thanda (Lake Eyre). Studies and translations by German Lutheran missionaries in the late 19th and early 20th centuries created an extensive written form. By the early 21st century, only a few fluent speakers of Diyari remained. However, by 2013 Peter K. Austin had produced a dictionary and grammar of the language, and as of 2019, there is a project under way to teach it in schools. Kaurna is the language of the Kaurna people of Adelaide and the Adelaide plains in South Australia. It is being revived by the Kaurna Warra Pintyanthi, a committee of Kaurna elders and youth, teachers, linguists and other researchers based at the University of Adelaide. Palawa kani is