If we want a dense and obvious indicator, we can just use { gugde + <ISO 3166-1-alpha-2 code> }
No, I'm serious.
Man, I keep looking at that and going back and forth. It does have a certain elegance, but is also has a certain, you know, just saying codes. I think the main problem with this method is--what if the ISO changes the codes, as recently happened with the language codes? I'm not sure the meanings of Lojban terms should be tied to the ISO codes, although I do still think the ISO lists are a great place to start.
Oren, can you clarify what you meant by "top-level" before in terms of language codes?
Chris