Lojban 25th Anniversary celebration, 2013, Fairfax, Virginia, USA.
Lojban 25th Anniversary celebration, 2013, Fairfax, Virginia, USA.
Lojban is a carefully constructed spoken language designed in the hope of removing a large portion of the ambiguity from human communication. It was made well-known by a Scientific American article and references in science fiction Lojban has been built over five decades by dozens of workers and hundreds of supporters.

Lojban has a number of features which make it unique:

  • Lojban is designed to be used by people in communication with each other, and possibly in the future with computers.
  • Lojban is designed to be culturally neutral.
  • Lojban has an unambiguous grammar, which is based on the principles of logic.
  • Lojban has phonetic spelling, and unambiguous resolution of sounds into words.
  • Lojban is simple compared to natural languages; it is easy to learn.
  • Lojban's 1300 root words can be easily combined to form a vocabulary of millions of words.
  • Lojban is regular; the rules of the language are without exception.
  • Lojban attempts to remove restrictions on creative and clear thought and communication.
  • Lojban has a variety of uses, ranging from the creative to the scientific, from the theoretical to the practical.

Interested? See and hear an example of spoken Lojban. You can also see this page written in Lojban.

Learn Lojban now or read the introductory brochure for a more detailed description of Lojban.

The Logical Language Group

This site is the official repository of materials from The Logical Language Group (LLG), the non-profit corporation which has led Lojban development since 1987.

As part of the LLG's commitment to the community, this site attempts to reflect a cross section of the Lojban community outside of the LLG. Some of the material on this site isn't officially sanctioned, but what is official is explicitly stated.


  • 22 March 2015 Following the reauthorization of BPFK, selpa'i was elected as the chair of BPFK as part of the ongoing 2014 Annual Meeting. A slate of members were also elected: Pierre Abbat, gleki, durka42, ilmen, xorxes, xalbo, And Rosta and guskant.
  • 24 February 2015 LLG Members at the 2014 Annual Meeting approved a reauthorization of BPFK. BPFK is reorganized as a standing committee with the charge of improving and maintaining formal descriptions of Lojban, elaborating undocumented and under-documented language features, resolving inconsistencies and errors in existing documentation, and responding to issues that arise in usage.
  • 15 February 2015 A review of formatting issues in the Prince PDF build of CLL started on February 1. A continuous build, which picks up changes as they are committed to the shared repository and then generates an updated PDF, was created by durka42 to aid this effort. After two weeks, 7 out of 19 chapters have been reviewed.
  • 17 January 2015 An IRC session of the 2014 Annual Meeting has been announced for Sunday, January 18, 2015, to take place in the #lojban channel at irc.freenode.net at 4pm UTC (8am PST, 11am EST, 5pm Paris/Berlin, 7pm Moscow, 1am January 19 Tokyo). The topic of the session will be CLL and the future of BPFK. See the Lojban IRC for details of how to connect to IRC.
  • 13 January 2015 John Cowan was awarded the honorary title of "Archgrammarian" or "balgenpre" in recognition of the magnitude of his contributions to Lojban, and his many years as a member, director and officer of LLG.
  • 10 January 2015 The 2014 election for the Logical Language Group Board of Directors, held among members at the 2014 Annual Meeting (ongoing), was finalized: Arkadii Balandin, Craig B. Daniel, Ali Sajid Imani, Riley Martinez-Lynch, and And Rosta were newly elected to the Board. Robert LeChevalier and Timo Paulssen were re-elected.
  • 15 December 2014 At the 2014 Annual Meeting of LLG (ongoing), an unprecedented nine lojbanists from six different countries were admitted as voting members of the Logical Language Group. Welcome az, durka, gleki, guskant, ilmen, mukti, selpa'i, tsani, and xalbo!
  • 15 November 2014 "bripre jikca 9", the tenth and final episode of "bripre jikca", is now available. The theme is {skari} ("color") and it includes texts by keidji, niftg, mukti, xorxes, and junpen on that topic, as well as readings by mizu'e and durka42.
  • 3 November 2014 The 2014 annual member's meeting of The Logical Language Group convened on November 3. The meeting will be conducted on the llg-members mailing list with at least one IRC session to be announced. Please respond to the announcement on the lojban-list if you do not currently have access to llg-members, but you wish to observe or participate in the meeting. The agenda includes a clarification of bylaw amendments that were approved at the 2003 meeting and a discussion of baseline policies.
  • 31 October 2014 "bripre jikca 8", the ninth episode of "bripre jikca", is now available. The theme is {fulta} ("floating") and it includes chef mankant's recipe for a floating island, and texts on that subject from durka42 and niftg. Submissions are requested by November 8 for the next episode (theme: {skari} — "color"), to be published November 15. bripre and mankant are taking a well deserved vacation, so this will be the last episode for the time being.


Unless explicitly stated otherwise the content of this website can be used under the terms of the Creative Commons Attribution license (CC-BY).


Creative Commons Attribution license (CC-BY) lets others distribute, remix, tweak, and build upon this website's content, even commercially, as long as they credit this website for the original creation.

Created by chrisd. Last Modification: Sunday 29 of March, 2015 20:52:08 GMT by mukti.