In the mean time, could we create languages on translate.wikidot.com using that language syntax? More explained, would it be practical for us to already start creating such country variations before this feature is implemented?

Yes!

Does this goes for two alphabets of the same language? The Serbian case is different, I cannot put the country code since it is two alphabets and not two countries. I would need sr-cyrillic and sr-latin.

I don't mind, you can call it whatever you consider correct. Just make it possible. :):):):):) I am not a formalist at all… :P

As far as this issue is concerned, I already asked somewhere else (I can't remember where, sorry) if there's a possibility to transliterate automatically this already existing Cyrillic translation to Latin script, because they should be identical, only with two scripts. There are transliteration programs and web pages (FF has an adon for this), and if you can do this, I can give you the list of Cyrillic letters and theirs correspondents in Latin Alphabet…

It's good the original translation is Cyrillic, because we don't need to watch out for things to not transliterate like Wikidot or HTML tags, which would be a problem in converting from Latin to Cyrillic.

Exactly. :) I did the same with SMF forum translation. First Cyrillic version, and then Latin one is done in a blink of an eye, without any possibility of error, because Latin letters in the HTML code stay Latin ones. :):):):)

I've created the "AU" language type (Australian English … to be renamed to en-AU if this wish is accepted).

http://translate.wikidot.com/lang:au

So far my main changes are changing "color" to "colour", and a few other minor changes like that. IIRC leaving fields blank means that it is taken from the default English (US) language instead, so I've only filled in the fields that I made changes to.

hehehe, I think you two have a very difficult decision to take… :):):):)..

Implemented.