Just what is an IETF Language Tag?

[amcgregor]

• http://www.langtag.net
• Wikipedia: IETF language tag

Historical

• Unicode Technical Standard #35: Unicode Locale Data Markup Language (LDML)
  • Notably, Unicode Language Identifier and following Unicode Locale Identifier sections.
• RFC 1766 Tags for the Identification of Languages obsoleted by…
• RFC 3066 Tags for the Identification of Languages obsoleted by…
• RFC 4646 Tags for Identifying Languages obsoleted by…

Current

• RFC 5646 Tags for Identifying Languages
• RFC 4647 Matching of Language Tags
• BCP 47 Language Tags (combines RFC 5646 & 4647)
• Language Subtag Registry Search

Utility

• BCP 47 Validator

Implementations

• JavaScript / Node
  • https://github.com/wooorm/bcp-47
  • https://github.com/gagle/node-bcp47
  • https://github.com/SafetyCulture/bcp47
  • https://github.com/mattcg/language-tags
  • https://github.com/hupe1980/langtag-utils
  • https://github.com/wooorm/bcp-47-match
  • https://github.com/aredridel/bcp47-stringify/blob/master/index.js 🙃
  • https://github.com/sebastian-software/resolve-locale
  • https://github.com/mattcg/language-subtag-registry
  • https://github.com/witty-pigeon/ietf-locale-parser
  • https://github.com/oxylian/i18n-js
  • https://github.com/supukarmin/format-bcp-47
  • https://github.com/konfirm/node-iso15924
• R
  • https://rdrr.io/cran/NLP/man/language.html
• PHP
  • https://github.com/whitecube/lingua
    Literally the only link I could find when searching Packagist.
• Python
  • http://babel.pocoo.org/en/latest/
  • https://github.com/zopefoundation/zope.i18n
  • https://github.com/LuminosoInsight/langcodes
  • https://github.com/bbqsrc/lcid-python
  • https://github.com/jsommers/langtags
  • https://github.com/signaln/language
  • https://github.com/OnroerendErfgoed/language-tags
  • https://github.com/mattcg/language-subtag-registry
  • https://github.com/night-crawler/cldr-language-helpers

Unicode Extensions

• https://github.com/unicode-org/cldr/tree/master/common/bcp47
• cur- https://github.com/unicode-org/cldr/blob/master/common/bcp47/currency.xml
• tz- https://github.com/unicode-org/cldr/blob/master/common/bcp47/timezone.xml

Test Suites

• https://github.com/unicode-org/cldr/blob/master/tools/java/org/unicode/cldr/util/data/langtagTest.txt
• http://www.langtag.net/test-suites.html

[jamescooke]

Thanks for a super helpful list of resources 👍 And good luck with the project too 👍