Internationalized Domain Names (IDNs) work by encoding domain names using a system called Punycode. When you wish to register an IDN domain, our system automatically converts the domain name into Punycode for the encoded version of the domain name to be registered. When a user enters a URL containing an IDN domain into a web browser, it will convert the IDN domain into Punycode and resolve that domain.

To avoid confusion and prevent fraud, IDN domain names should be only composed of characters from a limited subset of a given language or script. This is to prevent "homograph" attacks and other security problems as well as to resolve issues related to character variants within and between writing systems.