They use Australian English, which is derived from the British (U.K.) form of the written language, with its spelling and pronunciation.
Answer
Given that the British form of English covers a plethora of regional accents and dialects, it's worth noting that the Australian accent is largely, but not exclusively, derived from the English of London, and from Hibernian (Irish) English, as groups from these areas formed a large proportion of the early settlers and especially, convicts.
There is no specific number of people who speak "Australian" as a language. Australian English is the official language of Australia and is spoken by the majority of the population, along with various indigenous languages and immigrant languages.
When the English came to Australia the people that inhabited Australia did not speak English. As a matter of fact there are still places in Australia where English is not their first language.
English
There is no such language as Australian. People in Australia speak English, so they would say power point.
People in Australia speak English. G'day mate is a typical greeting.
Australian people speak Australian English. German is spoken in Austria. Sometimes these two countries are confused. However, there is a small but significant population of Germans living in Australia.
Eh most of them do speak English? only the ones who aren't American, Irish, English, Welsh, Scottish, Canadian, Australian and good English speakers don't. xD
There is no such language as Australian. Most people in Australia speak English, so they would say rat.
Same-they speak English there.
Um...Australian isn't a language. They speak English, so 'cat'.
Exactly how you say it in english
English is the language the Australian people speak.Unless you are talking about the language of aboriginal, the answer to your question is " thank you".