Internationalized Domain Names (IDNs) work by encoding the domain name 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 the user enters a URL containing an IDN domain into the web browser, it will convert the IDN domain into Punycode and resolve that domain.

To avoid confusion and prevent fraud, IDN domain names may only be 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.