internationalized domain name (IDN)
is an Internet domain name that contains at least one label that is displayed in software applications, in whole or in part, in a language-specific script or alphabet, such as Arabic, Chinese, Cyrillic, Tamil, Hebrew or the Latin alphabet-based characters with diacritics or ligatures, such as French. These writing systems are encoded by computers in multi-byteUnicode. Internationalized domain names are stored in the Domain Name System as ASCII strings using Punycode transcription