ISO, SIL, and BCP language codes for constructed languages

This is a list of ISO 639 codes and BCP 47 language tags for individual constructed languages, complete as of October 2007.

ISO 639-2 also has the code art for other artificial languages. BCP47 similarly has the subtag art, which together with the subtag x can be used to create a suitable private use tag for any constructed language that has not been assigned an official language tag (e.g., art-x-solresol could be used for Solresol, or art-x-latino-sine-flexione for Latino sine flexione).

Notes

The tags i-klingon and art-lojban are deprecated: they remain valid, but are no longer the preferred tags for these languages.

ISO 639-3 used to have the code occ for Occidental. This was retired on 18 July 2007, because Occidental is just another name for Interlingue, which has the code ile.

References

* [http://www.loc.gov/standards/iso639-2/php/code_list.php List of ISO 639-1 and ISO 639-2 codes] on the website of the ISO 639-2 Registration Authority
* [http://www.sil.org/ISO639-3/codes.asp ISO 639 code tables] on the website of the ISO 639-3 Registration Authority
* [http://www.iana.org/assignments/language-subtag-registry Language Subtag Registry] for BCP 47
* [http://linguistlist.org/forms/langs/get-familyid.cfm?CFTREEITEMKEY=AE List of constructed languages] on the Linguist List