Dharug language

The Dharug language, also spelt Darug, Dharuk, and other variants, and also known as the Sydney language, Gadigal language (Sydney city area), is an Australian Aboriginal language of the Yuin–Kuric group that was traditionally spoken in the region of Sydney, New South Wales, until it became extinct due to effects of colonisation. It is the traditional language of the Dharug people. The Dharug population has greatly diminished since the onset of colonisation. The term Eora language has sometimes been used to distinguish a coastal dialect from hinterland dialects, but there is no evidence that Aboriginal peoples ever used this term, which simply means "people". Some effort has been put into reviving a reconstructed form of the language.

The speakers did not use a specific name for their language prior to settlement by the First Fleet. The coastal dialect has been referred to as Iyora (also spelt as Iora or Eora), which simply means "people" (or Aboriginal people), while the inland dialect has been referred to as Dharug, a term of unknown origin or meaning. Linguist and anthropologist Jakelin Troy (2019) describes two dialects of the Sydney language, with neither Dharug (S64) nor Eora being in the historical record as language names.

Language scholar Jeremy Steele and historian Keith Vincent Smith have postulated the name "Biyal Biyal" for the language, based on evidence that this term or something like it was actually used.

A website devoted to Dharug and Dharawal resources says "The word Daruk was assigned to the Iyura (Eora) people as a language group, or more commonly referred to as the people that sustained their diet by the constant digging of the yams as a vegetable supplement. The Dark, Darug, Tarook, Taruk Tarug is related to the word Midyini, meaning yam".

The traditional territory of the coastal variety ("Iyora/Eyora", or Kuringgai) was estimated by Val Attenbrow (2002) to include "...the Sydney Peninsula (north of Botany Bay, south of Port Jackson, west to Parramatta), as well as the country to the north of Port Jackson, possibly as far as Broken Bay".

Attenbrow places the "hinterland dialect" (Dharug) "...on the Cumberland Plain from Appin in the south to the Hawkesbury River in the north; west of the Georges River, Parramatta, the Lane Cove River and Berowra Creek". R. H. Mathews (1903) said that the territory extended "...along the coast to the Hawkesbury River, and inland to what are now the towns of Windsor, Penrith, Campbelltown".

The word "Eora" has been used as an ethnonym by non-Aboriginal people since the late 19th century, and by Aboriginal people since the late 20th century, to describe Aboriginal peoples of the Sydney region, despite there being "no evidence that Aboriginal people had used it in 1788 as the name of a language or group of people inhabiting the Sydney peninsula".

With a traditional heritage spanning thousands of years, approximately 70 per cent of the Eora people died out during the nineteenth century as a result of the genocidal policies of colonial Australia, smallpox and other viruses, and the destruction of their natural food sources.