Thank you for your reply. Allow me to pose the question: If there was one TLD for the arabic language, why would we need to have a host of arabic national IDN TLDs? Who gains from such a scenario other than ccTLD managers and particular governments?
I'm not Siavash, but that seems to me approximately the same as asking why we need .US, .UK, .AU, .BZ, and .NZ rather than sharing a .ENGLISH domain. While it is true that the management style of ccTLDs varies a lot, huge numbers of registrants choose to use their ccTLD rather than a gTLD, and I don't see any reason that their preferences would change if they could register in a national language ccTLD. R's, John PS: I express no opinion here on the merits of national language versions of gTLDs, which are an even bigger can of worme.