A language code is a code that assigns letters or numbers as identifiers or classifiers for languages. These codes may be used to organize library collections or presentations of data, to choose the correct localizations and translations in computing, and as a shorthand designation for longer forms of language names.
Many (but not all) graphemes that are part of a writing system that encodes a full spoken language are included in the Unicode standard, which also includes graphical symbols. See:
The remainder of this list focuses on graphemes not part of spoken language-encoding systems.
ISO 639-1:2002, Codes for the representation of names of languages—Part 1: Alpha-2 code, is the first part of the ISO 639 series of international standards for language codes. Part 1 covers the registration of "set 1" two-letter codes. There are 183 two-letter codes registered as of June 2021. The registered codes cover the world's major languages.
Some languages do not have the ISO 639-1 codes because the standard was initially designed to represent major and primary national languages with well-established terminologies and lexicography. The ISO 639-1 is more restrictive than other ISO 639 standards, such as ISO 639-2 as well as ISO 639-3, which cover a wider range of languages and variations.
ISO 639-3:2007, Codes for the representation of names of languages – Part 3: Alpha-3 code for comprehensive coverage of languages, is an international standard for language codes in the ISO 639 series. It defines three-letter codes for identifying languages. The standard was published by International Organization for Standardization (ISO) on 1 February 2007.
As of 2023, this edition of the standard has been officially withdrawn and replaced by ISO 639:2023.
New Zealand English (NZE) is the variant of the English language spoken and written by most English-speaking New Zealanders. Its language code in ISO and Internet standards is en-NZ. It is the first language of the majority of the population.
The English language was established in New Zealand by colonists during the 19th century. It is one of "the newest native-speaker variet[ies] of the English language in existence, a variety which has developed and become distinctive only in the last 150 years". The variety of English that had the biggest influence on the development of New Zealand English was Australian English, itself derived from Southeastern England English, with considerable influence from Scottish and Hiberno-English, and with lesser influences the British prestige accent Received Pronunciation (RP) and American English. An important source of vocabulary is the Māori language of the indigenous people of New Zealand, whose contribution distinguishes New Zealand English from other varieties.
These are lists of ISO 639-3 language codes.
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ISO 639-2:1998, Codes for the representation of names of languages — Part 2: Alpha-3 code, is the second part of the ISO 639 standard, which lists codes for the representation of the names of languages. The three-letter codes given for each language in this part of the standard are referred to as "Alpha-3" codes. There are 487 entries in the list of ISO 639-2 codes.
The US Library of Congress is the registration authority for ISO 639-2 (referred to as ISO 639-2/RA). As registration authority, the LOC receives and reviews proposed changes; they also have representation on the ISO 639-RA Joint Advisory Committee responsible for maintaining the ISO 639 code tables.