Colonial languages tend to be bastardised, I had a Frenchie tell me that Quebecois talk in old French like Ye OLd Shoppe type of speech. @prowler
American English is in part a simplification as well as an exaggerated rural drawl, say compare Worsel Gummage/ Somerset to the Deep south. Australian is evolved Urban Working Class grunt monkeys.
Back in the day Urban Crims were transported to Aussie, wereas rural Crims were usually just hung. That also may reflect US lynching Culture. You go to any village and a local will tell you where they hung the Highway robbers. Usually it was a touring judge would hear cases in the village say once a month then if sentenced they were hung nearby. Saves a lot of money in poorer times and sometimes they didn't wait for the judge.