ooohhh.... design changes since last I was here
anyways, who says that the people of The Kingdom of Zeal has an Australian accent?
Accents change due to not only the geography, but also to the people who live there...
In that regard, you must know that Australia back in the day was used as a prison for convicts. Convicts were sent there from the British Commonwealth back in the 18th and the 19th Century.
So in essence, Australia was "built" from poor people, the undertones of which you can find today in the common Australian accent. If you listen to anyone speaking w. the Aussie accent (Croc Dundee anyone?), you can hear that it's less formal than the ordinary British accent.
The KoZ, however is a place where the higher ranks of society lives, so i'd rather think they talk with a british-ish accent, while the ones on the ground, could in theory speak a less formal accent...
Also, as English is my second Language (Danish the first), and is mandatory from the 4th grade of school here in Denmark, I started learning the British accent, though while in 5th grade I had to move to Australia (at that time (1999) I was 12 years old and I knew a lot of English before I even went to school, still with the more british accent), though about a year and a half later, I spoke fluently in a complete Australian accent... Even my dad (in his late thirties at the time) started to speak with the Aussie accent and has done so ever since, so it's not always at a young age thet accent can be manipulated...