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17 January 2021

- la janbe publishes tabgapci, an original song.

20 September 2020

- la solpa'i publishes Ua langu, an original song.

13 January 2020

- The LFK is selected and begins meeting on Mattermost.

24 September 2018

- la gleki publishes a translation of How the enemy came to Thlunrana, a story by Lord Dunsany dedicating it to a new meeting of the LLG.

24 July 2018

- la evar usar published an English video introduction to Lojban.

15 May 2018

- la evar usar published The Magic Unsystem (makfa nalciste), the fifth episode of a Lojban-language worldbuilding video series. (English subtitles)

28 April 2018

- la evar usar published The Human Inhabitans (remna xabju), the fourth episode of a Lojban-language worldbuilding video series. (English subtitles)

30 March 2018

- la evar usar published The Rainforest Buffet (cavyricfoi gusta), the third episode of a Lojban-language worldbuilding video series. (English subtitles)

28 February 2018

- la evar usar published The Food Web (citka je cidja ciste), the second episode of a Lojban-language worldbuilding video series. (English subtitles)


30 January 2018

- la guskant published the first episode of mEntulimu, a series of short videos about Lojban.

20 January 2018

- la evar usar published The Lay of the Land (tcila co tumla), the first episode of a Lojban-language worldbuilding video series. (English subtitles)

14 September 2017

- la guskant published almapamla, a translation of the song Amapola] by Joseph Lacalle

04 January 2017

- la uakci published no da re roi fasnu, a translation of Polish poem Nic dwa razy by Wisława Szymborska into Lojban.

12 November 2016

- la guskant published lo vliraitru, a documentary film in Lojban.

06 November 2016

- la uakci published sorxaizu'e sei catlu, a translation of Polish poem Terrorysta, on patrzy by Wisława Szymborska into Lojban.

13 October 2016

- la lalxu published la melbi e le ractu, an original short story in Lojban.

1 June 2016

- la selpa'i published lu mi za'o citno li'u, an original short story in Lojban.


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Google Groups: lojban

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Lojban (pronounced [ˈloʒban]) is an experiment in human language – a constructed language defined using predicate logic
This website is dedicated to documenting Lojban and the activities of the Lojban-using community, and also serves as the official website of the Logical Language Group (LLG), a non-profit organization founded in 1987 to promote the scientific study of the relationships between language, thought and human culture.

What is Lojban?

Lojban is a carefully constructed spoken language. It has been built for over 50 years by dozens of workers and hundreds of supporters.

  • Lojban's grammar is simpler than of most natural languages, but complex in its own unique way. Lojban is an experiment in thought, as well, it wishes to see how these unique language structures affect thought and understanding.
  • Lojban allows the expression of tiny nuances in emotion, using words called attitudinals, which are essentially spoken emoticons.
  • Lojban allows you to communicate concisely without unnecessary or undesired details. For example, you don't have to always think of what tense (past, present or future) to use in a verb when it's already clear from context.
  • Lojban texts can be easily parsed (analyzed) by computers, which allows potential new explorations in the fields of artificial intelligence and machine translation.
  • Lojban is unambiguous in syntax. Natural languages often have ambiguous sentences — does "He's left" mean that he's still here or that he's gone? Lojban systematically eliminates this.
  • Lojban has a live community of speakers expanding its vocabulary day by day.

Lojban means different things to different people:

  • a linguistic curiosity - a test-bed for language experimentation
  • a way to expand their mind or discipline their thought
  • a new way to look at languages
  • a fun way to meet and communicate with friends, entertainment, a challenge, art, software application

... the list goes on! What will Lojban mean for you?

More basic information ...

Learning Lojban

Official resources

  • The full grammar of Lojban. This book will teach you how to read and use Lojban, what the different types of words and grammatical constructs do. It will not, however, teach you vocabulary, style, or colloquial language.
IMPORTANT NOTE: Since the publication of the full grammar there has been a change to the semantics of Lojban articles known as xorlo. These changes simplify usage in that aspect and the new system is not difficult to grasp. Please keep this reform in mind when consulting the full grammar, as it was effectively published before the approval of xorlo.

Unofficial and supplemental resources

Different non-authoritative learning resources have been created. They are said to be more beginner-friendly.


Software tools

  • Memrise.com is a great place where you can learn Lojban words online. Just register on that website, try several courses and use the one that you like most. Alternatively use Anki (downloadable, Lojban decks are downloadable within the program) or additional memorization software to vastly improve your vocabulary.
  • camxes is an automatic grammar checker of what you write in Lojban (which is unique among all languages!) It can help you quickly understand whether your sentence is grammatically correct.

Other learning materials ...

Connect with the community

Lojban is spoken by a vibrant community of speakers, producing literature, music, and art, and solving together questions regarding Lojban. When the webcomic xkcd said that you'd have to be speaking Lojban with Lojbanists, it was indicating one of the best features of Lojban.

IRC (Internet Relay Chat)

It will allow you

  • to make friends,
  • to practice real-time Lojban conversation,
  • to get your questions answered quickly when there are others around.

Join the chat in your browser with the KiwiIRC application, or alternately with QWebIRC.

Here are the three channels (chat rooms) that are displayed as tabs in the upper left corner of the chat window:

  • #lojban for basic discussions in any language,
  • #ckule for questions from new learners in any language and
  • #jbosnu for discussions in Lojban only.

Here is an IRC cheat sheet for people who are learning Lojban.

For advanced users: if you have an IRC software installed you can use it to connect to the Freenode IRC network (the IRC server host name is chat.freenode.net , the port number is 6667, or 6697 for an SSL-encrypted connection) and join the channels mentioned above.

Mailing lists

  1. The mailing list for beginners will allow you:
    • to ask questions and understand parts of the language
    • to learn it better
    • will provide you with study tools, actual teaching sessions ...
    Send a question on Lojban to the mailing list for beginners. Wait until your first question is approved and others reply to it.
  2. The Lojban General Mailing List is for discussing more advanced topics related to Lojban in any language. It has about 500 subscribers, and has existed since 1989. You can also subscribe to it by sending a question to lojban@googlegroups.com.

3rd-party websites

Lojbanists also participate in groups on several websites, such as:

la jbotcan
la jbotcan
la jbotcan is a simple Lojban image board where one posts images and comments them and discuss other random stuff. The atmosphere is very informal here. There is a Lojban and an English version.

International Contacts

Lojban around the world - other ways of communication ...

What's next?

  • Write your own original texts (prosa or poetry) in Lojban or translations. Start writing a blog or a personal diary
  • Talk to other Lojbanists in Lojban in text of voice chats.
  • Try reading proofread (proofed by at least one Lojbanist in addition to the author) Lojban texts, starting with short-and-easy through to long-and-difficult. For example, read Terry the Tiger (you can listen to this one too!), then one of the Berenstain Bears books, for example The Berenstain Bears and the Prize Pumpkin, then The Little Prince.
  • Analyze the lexicon and the grammar, make proposals and participate in the work of BPFK, the main committee for developing Lojban.
  • Contribute to la jbovlaste, a live Lojban dictionary, by adding new words. You may also translate definitions into one of the many, many languages that this application supports.

More info ...