English is not simply a language used for communication by English people. It is a worldwide common language as well. We should call it the lingua franca but that sounds slightly wrong to me. Anyway, as a result we must be tolerant of different styles.
Australians are reasonably ok. They do little else apart from change the ending of all nouns to 'i' or 'ie' eg Uni, tinnie, hostie etc.
By contrast Americans like to make up new words and constructions rather that use existing ones. You may be inclined to think this is not actually English but something called perhaps georgebushish, but you are wrong. It is still the language of Shakespeare (not that you can understand that without help).
The main thing is do you understand what they are saying. The answer is - almost always you do.