Some registry operators, as well for gTLDs as for ccTLDs, have been allowing registrations with diacritical signs (e.g. café.dk, müller.com) or in non-Latin characters (ex. 无忧蜂鸣.cn), while some extensions in non-Latin characters have already been created (ex. .рф).
Read more here: http://www.vanksen.com/blog/your-domain-name-which-extension/.
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