Question

It is possible to register IDN domains?

Answer

To register an IDN domain name, request the registration as a normal domain, from Domain Management > Domain registration.

Make sure the full name is written in the language that you select.
A mix of languages is not possible. So you can not create a domain which exists of multiple languages. All symbols of the domain needs to be from the same language.

Otherwise the error "Domain creation failed: 2306, Parameter value policy error; IDN
mismatches with Language" will be shown.

And then:

1. Once the domain name is written choose the language of that domain.  

2. Click on Next and our system will automatically transform that domain name into IDN domain. You can proceed as an usual domain name, adding the contacts and nameservers.

When configuring the DNS, just use the IDN variant and it will work without any issues.