Greg!
That is a big question you are asking, and I have only vague theories as to your question’s true answer. Most importantly, I feel I should say that I don’t know how Nickelodeon distributes it’s international broadcast.
However, I would assume that things like dubbing don’t contribute as much as when the series is sold and to whom. As with most delays (or like the music for A:TLA which wasn’t officially released), it has more to do with a business decision than any sort of malicious one. And Korra is currently being produced and aired in it’s country of origin, so delays to international broadcast are just expected sometimes.
Instant viewing, the posting of the episode online, iTunes and the varied methods of non-cable are actually the way international fans get to see it first, both because it’s made accessible earlier to them (you) than any broadcast and because it’s these methods that pirates can easily copy.
I don’t support pirating content from The Legend of Korra because I think they’re doing a pretty good job of getting it out there (Amazon, Greg, is great, I have an iTunes Season Pass for my re-watch that I gladly payed, what, $30 for?)
HOWEVER – Nickelodeon still hasn’t released the third season of The Adventures of Pete and Pete on DVD because there wasn’t enough business incentive to get it done. So I’m not saying I’m above pirating Nick content, I’m saying that Korra probably ends up online somewhere you can watch it if you speak English.
If not, you’re at the whims of the business, which isn’t the best place to be, but there’s little we can do about it.
-Da7e-