The term "outback" refers to the minimally occupied regions beyond the main settlements. It comes from the fact that it is "out the back of beyond". It is, quite simply, a long way from civilisation. There seem to be no restrictions to the continuous wide, open spaces, and when you are in the outback there's a good chance that, unless you're on the major highways, you can travel for hours without meeting another car. Australia is a vast country, with huge tracts of unoccupied, dry land, which is the outback. It is its geography which makes it "the outback".
There is no state or territory with the specific nickname of "Outback Territory". Outback territory refers to any part of Australia's outback. However, the question could refer to the Northern Territory, which comprises both the Red Centre and the Top End, nicknames for distinctive parts of Australia.
This is known as the outback. It comprises vast plains of fertile land, semi-arid and less productive land, and desert.
The northern part of Western Australia is known as the Kimberley region.
Outback
You could say la brousse ("lah brooss"), but that does not specifically refer to the region of Australia called the outback, for which there is no French translation.
An example of a venacular region of Australia would be the outback
The vast central region of Australia is popularly known as the Outback. It is characterized by its arid landscapes, sparse vegetation, and extreme temperatures. The Outback covers a large portion of the Australian continent and is home to unique flora and fauna.
Western Australia.
Western Australia
Woomera lies in the outback and desert region of South Australia, north of the Eyre Peninsula.
Australia's landscape is dominated by the Outback, a region of deserts and semi-arid land.
Region in Western Australia.
There is no capital of the outback. It is a general region encompassing a very large area of inland Australia. There are several large towns and small cities in the outback, each serving a particular function, but none is a capital.