A few years ago, it was only possible to register domains that contained ASCII characters. This caused difficulties because sometimes domains could not exactly represent the desired string for registration and the customers had to find an alternative name.
Now this is no more an issue thanks to the so called IDN (Internationalized Domain Names) registration. IDN allows you to reserve domain names of all known languages.
The technical process for enabling it could be briefly summarized as a conversion of all entered characters to ASCII characters, thus allowing the existing infrastructure to operate with IDN. The result of such conversion is called PUNYCODE. We show the PUNYCODE presentation in our registration procedure for your convenience and you can also verify it.
Web sites where you can do this are (IDN specific knowledge is required):