Is this how Australians write Australia?

Not sure how they write,  but if they sound any thing like Kiwis ( which they do) hearing them say ‘ I’m just sitting on the deck’ is hillarious :)

I'm not sure but I've heard marine life refer to it as "Oysteralia"

Its only rite down under.....:)D 

umop apisdn

Stop showing off.   

Ha ha! No.
Our script is the same as yours.
Our spelling, punctuation and grammar follow the English.
Apart from accents, we have many variations in pronunciation, vocabulary and idiom.

Main differences include:
metric versus imperial measures,
opposite seasons of the years,
vastly different ecologies and geographies,
many subtle differences in cultures and values,
time zones roughly 16 hours ahead of yours - hence for us Valentine's day is now nearing sunset while yours has not yet begun,
generally about 5% further left in politics and 20% less inclined to be religious,
generally much less prudish and more matter of fact about sexual matters,
more diplomatic and polite but in a casual guise, and
differing senses of humour, much more akin to the British.