Lol. All my life I swore black and blue that I would never set as much as a little toe on Australian soil. Thing is though I forgot to teach my kids this morsel of wisdom. They came here first and demanded I join them. That was 5 years ago. And I love it here. But I'm still a kiwi.
What our little interaction is that within the English speaking world, there is a very wide variation in the lingo between the various places, even when they are separated by a county or two or states and countries.
Just as the various language translations helped unify a particular translation language, time also causes new language variations to develop as people separated out into diverse locations.
Children also have developed their own version of English in our respective cases so that we as parents really have no idea what they are saying.
Today Microsoft, and other computer program companies, can be credited with forcing "the limited America English" on many people with their word processing packages that suggest ways of expressing ourselves, words to use to describe different things etc. and grammar construction.
In fact they are responsible for dumbing people down such that they are now incapable of spelling words that have more than two or three syllable in them.
Now we know that when a NZ'er says "6" it does to the Aussie's ear sound like "sex."
It is these differences in pronunciation of words that make English a difficult language to navigate at the best of times.