User:Dunte2002/Books/IETF Language Tag

an abbreviated language code

 * IETF language tag
 * ISO 639-5
 * ISO 3166-1
 * ISO 639-1
 * ISO 639
 * ISO 15924
 * ISO 3166
 * UN M.49
 * Country code top-level domain
 * Internet Assigned Numbers Authority
 * Common Locale Data Repository
 * Arabic numerals
 * Eastern Arabic numerals
 * Hebrew calendar
 * Tz database
 * Unicode Consortium