Thanks for pointing out the link error: corrected!

The two-letter abbreviations appeal to my nerdy side, but we should be realistic. Steemit is developing into a worldwide community, and it is inevitable that many Steemians will not be familiar with the arcane details of ccTLDs (or even the existence of this unpronounceable abbreviation), or be misled into thinking that they are language codes.

Misleading ccTLDs (country code Top-Level Domains)

zh = China (not Chinese)
.il = Israel (.he, not currently used, is not Hebrew)
.ca = Canada (not Cambodian: use .kh instead)
.ar = Argentina (not Arabic)

Early adopters tend to be people with computer skills (HTML coding, knowledge of programming, network basics, domain names etc.). Many new Steemians have a shaky command of English. Thus, even a simple, basic tag such as #introduceyourself has given rise to #introducemyself, #introduction, #introductions and #introduce.

It seems best to keep things simple and easily guessable. #learn + [common English name of language] is probably the best choice.