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                                                      Language Subtags, Tag Extensions, and Tags

   Last Updated
   2024-12-20

   Available Formats
   [IMG]
   XML [IMG]
   HTML [IMG]
   Plain text

   Registries Included Below

     • Language Subtag Registry
     • Language Tag Extensions
     • Language Tags (OBSOLETE)

Language Subtag Registry

   Registration Procedure(s)

 Expert Review

   Expert(s)

 Michael Everson (primary), Doug Ewell (secondary)

   Reference
   [RFC5645][RFC5646]

   Note

 Registration requests should be submitted to the
 [ietf-languages@ietf.org] mailing list. For more information, see
 [RFC5646], Section 3.5.


   Note

 The format of the registry is explained in Section 3 and Section 3.1
 of [RFC5646].

 When referring to language tags in specifications, please refer to
 [RFC5646].


   Registry File


 [https://www.iana.org/assignments/language-subtag-registry]


   Supplemental Information


 Language subtag registration forms are available in the [Language
 Subtag Registration Form Archive.]


Language Tag Extensions

   Registration Procedure(s)

 IETF Review or IESG Approval

   Reference
   [RFC5646]

   Note

 While registration requires IESG approval or an IETF Stream RFC, the
 maintaining authority for an extension can submit changes to contact
 information and/or URLs directly to IANA, as described in [RFC5646],
 Section 5.2.


   Registry File


 [https://www.iana.org/assignments/language-tag-extensions-registry]


Language Tags (OBSOLETE)

   Registration Procedure(s)

 Registry closed

   Reference
   [RFC3066][RFC4646]

   Note

 This registry is obsolete and has been replaced by the [Language
 Subtag Registry], as described in [RFC4646], Section 5.1.


   Registry File


 [https://www.iana.org/assignments/language-tags]


   Supplemental Information


 Language tag registration forms are available in the [Language Tag
 Registration Form Archive].


   Licensing Terms