As a southernet, I have similar problems with southy Boston. The accent totally looses me.
Also some British English I find very melodic and beautiful actually, and others I can't tell if the words are made up or not.
What about written English from other parts of the commonwealth? Austraila? South African? Any experience with. Written exchanges from people from those countries? Are there similar problems, or is this a uniquily US change of the language? Perhaps be wise generally the US English branched with less influence and earlier then other British offshoot. I am guienuenly interested in the etimological differences.
Certain parts of scotland, and definately ireland have a very melodic sound to their spoken accent. Conversely other parts of those two countries have incredibly harsh sounding accents, probably to make up for the other half. Most of the words are made up.
South africa is very different because it has a massive dutch influence so theres quite a lot of cross over with what they call 'africaans' (god knows if thats spelt right).
The Aussies and kiwis have quite strong accent and some bloody odd made up words (like calling women 'sheilas' and beers 'tinnies') but in generally their written english is unidentifiable from english english. As you said, they have had a lot less time being separate from us, and in fact they arent actually separate from us now, what with sharing the same queen and all.