On another expat forum the "hard" Australian accent has been introduced, and it seems appropriate for it to be covered here on expat.com as well. There must be many immigrants to Australia who are lost for words, as it were, by not being able to understand what some of the natives say when speaking among themselves. I myself don't speak Strine, but I did when I first left the country. I well remember an embarrassing car journey in Cornwall when I was new to England. Hitching, I was picked up by a young Cornishman and his girlfriend. She spoke standard English, but had been to Australia; for the forty minutes I was in the car, she had to translate every single sentence he and I said to each other. Here is the relevant Wikipedia entry.
https://en.wikipedia.org/wiki/Afferbeck_Lauder