ISO 639

ISO 639 is a standard by the International Organization for Standardization (ISO) concerned with the representation of languages and language groups. It currently consists of four sets (1–3, 5) of code, named after each part which formerly described respective set (part 4 was guidelines without its own coding system); a part 6 was published but withdrawn. It was first approved in 1967 as a single-part ISO Recommendation, ISO/R 639, superseded in 2002 by part 1 of the new series, ISO 639-1, followed by additional parts.

Extends: [ISO 639](https://wikipedia.org.ai/ISO 639), [ISO standards](https://wikipedia.org.ai/ISO standards), [Language identifiers](https://wikipedia.org.ai/Language identifiers), [Internationalization and localization](https://wikipedia.org.ai/Internationalization and localization), [1967 introductions](https://wikipedia.org.ai/1967 introductions)