What is "australian english"

Australian English (AusE, AuE, AusEng, AustralE, en-AU) is a major variety of the English language, used throughout Australia. Although English has no official status in the Constitution, Australian English is the country's de facto official language and is the first language of the majority of the population.

Australian English began to diverge from British English after the founding of the Colony of New South Wales in 1788 and was recognised as being different from British English by 1820. It arose from the intermingling of early settlers from a great variety of mutually intelligible dialectal regions of the British Isles and quickly developed into a distinct variety of English.

Australian English differs from other varieties of English in vocabulary, accent, pronunciation, register, grammar and spelling.