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Lojban

constructed language based on predicate logic
Intangible logical_language Q36350
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Summary

Lojban is a logical language[1]. Lojban draws 2,336 Wikipedia views per month (logical language category, ranking #1 of 2).[2]

Key Facts

  • Creator: Logical Language Group[3]
  • Based on: Loglan[4], artificial intelligence[5], psychology[6], predicate logic[7], Láadan[8], English[9], Spanish[10], Hindi[11], Russian[12], Mandarin[13], Arabic[14]
  • Writing system: Lojban alphabet[15], Latin script[16]
  • Commons category: Lojban[17]
  • Wikimedia language code: jbo[18]
  • Inception: 1987[19]
  • Official website: https://mw.lojban.org/index.php?title=Lojban&setlang=en[20], https://mw.lojban.org/index.php?title=Lojban&setlang=ja[21], https://mw.lojban.org/index.php?title=Lojban&setlang=zh[22], https://mw.lojban.org/index.php?title=Lojban&setlang=jbo[23], https://mw.lojban.org/index.php?title=Lojban&setlang=ru[24], https://mw.lojban.org/index.php?title=Lojban&setlang=es[25], https://mw.lojban.org/index.php?title=Lojban&setlang=fr[26], https://mw.lojban.org/index.php?title=Lojban&setlang=lv[27], https://mw.lojban.org/index.php?title=Lojban&setlang=hu[28], https://mw.lojban.org/index.php?title=Lojban&setlang=nds[29], https://mw.lojban.org/index.php?title=Lojban&setlang=pl[30], https://mw.lojban.org/index.php?title=Lojban&setlang=pt-br[31], https://mw.lojban.org/index.php?title=Lojban&setlang=sv[32]
  • Topic's main category: Category:Lojban[33]
  • Inspired by: Loglan[34]
  • Described at URL: http://inthelandofinventedlanguages.com/index.php?page=languages&id=467[35], https://database.conlang.org/view/?conlang=368[36], https://cals.info/language/lojban/[37], https://linguifex.com/wiki/Lojban[38], https://www.frathwiki.com/Lojban[39], https://xextan.miraheze.org/wiki/Lojban[40], https://toaq.me/Lojban[41], https://loglangs.wiki/Lojban[42]
  • Language regulatory body: Logical Language Group[43]
  • Number of speakers, writers, or signers: 0[44]
  • Stack Exchange tag: https://conlang.stackexchange.com/tags/lojban[45]
  • IRC channel URL: irc://irc.freenode.org/#lojban[46]
  • Native label: la .lojban.[47]
  • Exact match: http://publications.europa.eu/resource/authority/language/JBO[48]
  • Linguistic typology: isolating language[49], logical language[50]
  • Does not have characteristic: agreement[51]
  • Related category: Category:Lojban pronunciation[52]

Why It Matters

Lojban has Wikipedia articles in 26 language editions, a strong signal of global cultural recognition.[53] Lojban is known by 19 alternative names across languages and contexts.[54]

Related Entities

artificial intelligence John Cowan psychology

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [4] ↑ . wikidata.org.
  2. [5] ↑ . wikidata.org.
  3. [6] ↑ . wikidata.org.
  4. [7] ↑ . wikidata.org.
  5. [8] ↑ . wikidata.org.
  6. [9] ↑ . wikidata.org.
  7. [10] ↑ . wikidata.org.
  8. [11] ↑ . wikidata.org.
  9. [12] ↑ . wikidata.org.
  10. [13] ↑ . wikidata.org.
  11. [14] ↑ . wikidata.org.
  12. [3] ↑ . wikidata.org.
  13. [15] ↑ . lojban.github.io. lojban.github.io. Provenance: wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . wikidata.org.
  19. [21] ↑ . wikidata.org.
  20. [22] ↑ . wikidata.org.
  21. [23] ↑ . wikidata.org.
  22. [24] ↑ . wikidata.org.
  23. [25] ↑ . wikidata.org.
  24. [26] ↑ . wikidata.org.
  25. [27] ↑ . wikidata.org.
  26. [28] ↑ . wikidata.org.
  27. [29] ↑ . wikidata.org.
  28. [30] ↑ . wikidata.org.
  29. [31] ↑ . wikidata.org.
  30. [32] ↑ . wikidata.org.
  31. [33] ↑ . wikidata.org.
  32. [34] ↑ . wikidata.org.
  33. [35] ↑ . wikidata.org.
  34. [36] ↑ . wikidata.org.
  35. [37] ↑ . wikidata.org.
  36. [38] ↑ . wikidata.org.
  37. [39] ↑ . wikidata.org.
  38. [40] ↑ . wikidata.org.
  39. [41] ↑ . wikidata.org.
  40. [42] ↑ . wikidata.org.
  41. [43] ↑ . wikidata.org.
  42. [44] ↑ . wikidata.org.
  43. [45] ↑ . wikidata.org.
  44. [46] ↑ . wikidata.org.
  45. [47] ↑ . wikidata.org.
  46. [48] ↑ . Language. op.europa.eu. Provenance: wikidata.org.
  47. [49] ↑ . wikidata.org.
  48. [50] ↑ . wikidata.org.
  49. [51] ↑ . lojban.org. Retrieved . lojban.org. Provenance: wikidata.org.
  50. [52] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [53] ↑ . Wikidata sitelinks. wikidata.org.
  3. [54] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Lojban. Retrieved October 13, 2026, from https://4ort.xyz/entity/lojban
MLA “Lojban.” 4ort.xyz Knowledge Graph, 4ort.xyz, 13 Oct. 2026, https://4ort.xyz/entity/lojban.
BibTeX @misc{4ortxyz_lojban_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Lojban}}, year = {2026}, url = {https://4ort.xyz/entity/lojban}, note = {Accessed: 2026-10-13}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Lojban — https://4ort.xyz/entity/lojban (retrieved 2026-10-13)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 19w ago · Yug · 2026-05-30 view diff on Wikidata ↗
    Instance of → logical language
    "/* wbsetclaim-create:2||1 */ Instance of: constructed language"
  2. 20w ago · Twofivesixbot bot · 2026-05-23 view diff on Wikidata ↗
    Flag image → Lojbanlogo.svg
    Creator → —
    Inception → +1987-00-00T00:00:00Z
    Website → —
    + 17 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update-qualifiers:1||1|3 */ National library of israel j9u id: 987007559286405171, mv to monolingual text names on J9U statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.