ISO 639-1 - WikipediaMany multilingual websites, including Wikipedia, use these codes to prefix URLs of localised versions: for example, ja.wikipedia.org is the Japanese version of Wikipedia. However, two-letter country code top-level domains (CCTLDs) are often different from these language-tag prefixes. ISO 639, the original standard for language codes, was approved in 1967.[3] It was split into parts, and in 2002 IS
