In Amerika, Australia and in GB isn`t spoken the same“English“. There is a Aussie English in Australia, British English in GB an American English, yes in America. It is logical that in differents countries are spoken other colloquialisms.
For example in Australia a lot auf words end with a /a/ or are pronounced with /r/. The /r/ is called the „t-flap“ , it is used in Oz. Oz means Aussie and Aussie means Australia. Oz is an example for Hypercoristic. There are a lot of more examples like mozzie which means mosquito, fantazzo means fantastic or gifty means gift. You see Englisch is a very creative language. Also people who speak English, add words and than have a new word for example text and book is textbook. There is also something called blending, it means that the first half of a word is connected with the second part of a other word for example breakfast and lunch iis called brunch.
They also cut words or let the final part out. Sometimes they use the intital letters of words and put them together into a new word. For example USA or CD.
So English is a very creative and sometimes a really strange language, but we also have it in German and Austria or Swiss. Or even in Germany for examples moin and servus.