In terms of language, Australia has no official language, but English is spoken widely throughout the country, followed by Chinese. Its currency denomination is in form of 5$, 10$, 20$,50$, 100$ and coin are in 5c ,10c, 50c, 1$, 2$. With high one of the highest ATM densities in cities, you will have no problem, but you always have the option of cashing out in supermarkets and convenience stores. But cash might not be that much handy as it is convenient to use debit/credit cards as most shops have Eftops pay with only some shops being an exception. The power Socket that is used to supply appliances is a type I with a voltage of 20v and 50hz. Don’t expect fast internet as Australia ranks 68th in the global ranking of the internet but as easily accessible Wi-Fi as it is free in malls, libraries, and schools with 4G and 5G networks. There is also a wide mobile plan available with a monthly payment plan and other plans provided by a wide range of providers like Telstra, Vodafone, Optus, Dodo.