Codes for constructed languages

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This is a list of ISO 639 codes and IETF language tags (BCP 47) for individual constructed languages, complete as of November 2009.

ISO 639-2 and ISO 639-5 also have the code art for other artificial languages. The BCP 47 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 jbo-x-loglan for Loglan).

The old SIL language identifiers (usually written in capitals) are officially obsolete and should no longer be used. They formed the basis of the ISO 639-3 language codes, but some SIL identifiers that had been retired before the establishment of ISO 639-3 were later assigned to different languages within ISO.

The IANA Language Subtag Registry (for IETF’s language tags defined in BCP 47) was updated on 29 July 2009 to include all ISO 639-3 and ISO 639-5 identifiers in use at that time.

List of codes[edit]

Language ISO
BCP 47 SIL MultiTree
Afrihili   afh afh afh    
Blissymbols   zbl zbl zbl    
Brithenig     bzt bzt    
Dutton Speedwords     dws dws    
Enochian       i-enochian[1]    
Esperanto eo epo epo eo ESP  
Europanto     [2]   EUR  
Ido io ido ido io    
Interglossa     igs igs    
Interlingua (IALA) ia ina ina ia INR  
Interlingue (former Occidental) ie ile ile[3] ie    
Klingon   tlh tlh tlh
Kotava     avk avk   avk
Láadan     ldn ldn   ldn
Lingua Franca Nova     lfn lfn    
Lojban   jbo jbo jbo
Na'vi           08n
Neo     neu neu    
Novial     nov nov    
Quenya     qya qya   qya
Romanova     rmv rmv    
Sindarin     sjn sjn    
Talossan     tzl      
Volapük vo vol vol vo    

See also[edit]


  1. ^ a b c The old BCP 47 language tags i-enochian, i-klingon and art-lojban are old tags that were grandfathered in. The last two are also deprecated in preference to the later three-letter codes.
  2. ^ The ISO 639-3 standard previously included the code eur for Europanto, which was retired on 2009-01-16, with the reason “Nonexistent”.[1].
  3. ^ 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.