The rules for international domain names (IDNs) are determined by the Internet Corporation for Assigned Names and Numbers (ICANN), which oversees the registration and management of domain names.
1. Allowed Characters: IDNs can contain any language-specific characters, such as non-Latin scripts, symbols, and accents.
1. Length Restrictions: The maximum length for an IDN is 63 characters, but this may vary depending on the top-level domain (TLD) used.
1. Language and Script Requirements: IDNs must use a language-based script, such as Arabic, Cyrillic, Chinese, or Hebrew.
1. Registration Restrictions: IDNs may have certain registration restrictions depending on their country of origin and language. For example, some IDNs may only be available to residents of the country where the language is spoken.
1. Technical Requirements: IDNs must conform to a certain technical standard, known as the Internationalized Domain Name (IDN) protocol, which enables compatible browsers to display and navigate IDNs correctly.
1. Compatibility: IDNs may not be compatible with all browsers or applications, so website owners need to ensure that their IDN can be accessed by their intended audience.
