Bem-vindo! (Português brasileiro)

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Lojban (pronuncia-se [ˈloʒban]) é uma língua criada por um grupo de linguístas ao longo de 10 anos, que vem ganhando vários adeptos pelo mundo, notavelmente em em países anglófonos.

É uma língua construída com base no chamada lógica de predicados, tornando-o uma espécie de ponte entre diferentes línguas e culturas.

Lojban, a Odisséia para nosso Universo.

O que é que é único sobre essa língua? Todas as línguas naturais nascidas de um povo e cultura têm desvantagens internas como complicações em regras gramaticais, preconceitos e restrições que desencorajam outras formas de pensar. Lojban é projetado para nos libertar destas restrições e ver o mundo de forma mais completa.

As vantagens de Lojban são:

  • Falar em Lojban permite você dizer as coisas de uma forma mais curta, sem detalhes desnecessários que distraem. Por exemplo, você não precisa sempre pensar em qual tempo (passado, presente ou futuro) irá usar em um verbo, quando já está claro a partir do contexto. Quando você precisar de detalhes, você adiciona-os. Mas, ao contrário de outras línguas, Lojban não força a isso.
  • Lojban dispõe de ferramentas inéditas para expressar emoções humanas.
Faça uma pergunta em Lojban
neste espaço para convidados

Lojban é uma viagem sem fim.

Sendo cuidadosamente trabalhada pelos seus criadores, Lojban dispõe de precisão e revela os delicados aspectos da lógica e de nossa mentalidade.

  • Lojban é limpo, simples, e com todas essas vantagens, o faz uma língua poderosa. Por que não começar a falar? *Lojban é para aqueles artistas que adorariam expressar os mínimos detalhes das emoções humanas.
  • Lojban é para os amantes do conhecimento (filósofos, no sentido original).
  • Lojban é para os cientistas que gostam de todos os conceitos sejam postos em um sistema conciso.
  • Lojban é a melhor ferramenta para a implementação de máquina de tradução automática.
  • Lojban rompe a barreira da incompreensão de pessoas com diferentes origens.
  • Por último, Lojban também é divertido!

Lojban é fácil de aprender - o número de radicais no idioma é somente de 1341. Não é muito para começar a falar!

E você pode falar de uma forma concisa:

✔ "co'e" (pronuncia-se "sho-rre") em Lojban significa "thinkamagic/crap/any object" ;) .

✔ "se catlu" (pronounced as "seh shatlooh") - all that can be looked at: a face, a mountain landscape, the book.

This website stores basic information on Lojban for free public access.


Welcome to the Lojban wiki!

What is Lojban?

Beauty in the artifice: an introduction to Lojban by Ewa
a «lightning talk» introduction to Lojban by Timo Paulssen

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 based on simple rules, and its linguistic features are inspired by predicate logic.
  • Lojban allows the expression of nuances in emotion using words called attitudinals, which are like spoken emoticons. ue marks that you're surprised; ba'u marks that you're exaggerating.
  • You can be as vague or detailed as you like when speaking Lojban. For example, specifying tense (past, present or future) or number (singular or plural) is optional when they're clear from context.
  • Lojban is machine parsable, so the syntactic structure and validity of a sentence is unambiguous, and can be analyzed using computer tools.
  • There is a live community of speakers expanding the Lojban vocabulary day by day.

Lojban means different things to different people

  • a linguistic curiosity - a test-bed for language experimentation
  • a challenging way to expand their minds or discipline their thoughts
  • a new perspective on languages
  • an entertaining medium to communicate with friends or create art
  • a domain for exploring the intersection of human language and software

What will Lojban mean for you?

Learning Lojban

These are learning resources that are made by people speaking Lojban and that represent personal views of those authors:

A set of pronunciation guides + la karda, a rapid-fire overview of the grammar in small pieces
search the dictionary
la sutysisku.png
la camxes is an automatic grammar checker of Lojban utterances. It can help you to understand the structure and correctness of sentences.
Wave Lessons, a popular textbook
Lojban guide
Provides hover translations of both sentences/phrases and words they contain.
Lojban in simple phrases
Also available in PDF.
try searching for arbitrary words in
the database of sentences
La Muplis.png
Some of the sentences are not proofread by fluent speakers of Lojban.
Join the chat
and try talking to other Lojbanists when they appear there. Try asking them questions.
yt-lesson in lojban i.png
«Lessons in Lojban» by Dustin Lacewell

Also check out Aesop's Fables for Lojban Learners, a work in progress. The intent is to start from very basic knowledge of Lojban, gradually learning new features through translating Aesop's Fables.

This is the resource officially approved by The Logical Language Group:

The Complete Lojban Language
  • "The Complete Lojban Language", a reference grammar of Lojban. This book will help those who already understand some Lojban. It's the most complete reference of Lojban language by far. It does not, however, teach vocabulary, style, or colloquial language. Please note that since the initial publication of the reference grammar, some language reforms such as xorlo have become widely adopted.


Software tools

  • offers on-line Lojban vocabulary flashcards. Anki is a downloadable alternative.
  • A Lojban-to-English translator. It is not precise, it can sometimes fail to correctly translate from English to Lojban or vice versa. It can be used to get at least some understanding of how Lojban works.

Other learning materials ...

Connect with the community

«ro lo ma'a datka» and other Lojban songs by la guskant
«bripre jikca», a community literary vlog
«ba'o», a song by La Djemynai

Lojban is spoken by a vibrant community, producing literature, music, and art, and discussing questions about language and thought. The web comic xkcd said that, if you spoke Lojban, you'd have to speak with Lojbanists. That may not be such a bad thing!

Instant messaging (text chat)

Connecting quickly

To get connected to Lojban chat use any of the following methods (your and others' messages will be available in all of them no matter which method you use).

People involved in Lojban community usually read each day's backlog and will answer your questions within several hours and often even within minutes.


Using this method you will be able to read the history of the chat since the beginning of 2016.

  1. Install the free Telegram messenger on your Apple, Android or your desktop device
  2. join main Lojban chat groups by following these links:
  3. Ask questions on Lojban in ckule group, talk in or about Lojban in Lojban group and talk only in Lojban in jbosnu group.


The chat is also connected to a Discord server.

  1. Ask questions on Lojban in #ckule channel, talk in or about Lojban in #lojban channel and talk only in Lojban in #jbosnu channel.
  2. Freely chat about anything to like-minded Lojbanists in the #jboselbau channel.

Direct web access

Using this method you will be able to see messages that are sent only while you are connected.

  1. Navigate to the web-based IRC client (Kiwi), choose a nickname you want yourself to be known as, and click "Start". Easy!
  2. Click on the channel you want (tabs on the top of the page), and type your text in the text bar at the bottom - the last line at the bottom of the chat page.
  3. Ask questions on Lojban in #ckule tab, talk in or about Lojban in #lojban tab and talk only in Lojban in #jbosnu tab.

You may alternately try other methods of connecting.

Mailing lists

The lojban-beginners mailing list is for questions about learning and understanding Lojban. You can subscribe to the list by sending a question to [email protected].

The general-purpose lojban mailing list, which covers anything else related to Lojban, was founded in 1989, and has about 500 subscribers. You can subscribe to it by sending an email to [email protected].

Social media

Lojban has a presence on many of the most popular web sites: Facebook Logo Mini.svg Facebook, Google plus icon.svg Google+, reddit-12.png Reddit, quora.png Quora.

International Contacts

an exposition by la guskant in Japanese
  Languages spoken
la selpa'i
[email protected]
English, German
la gleki
[email protected]
English, Russian
la ilmen
[email protected]
English, French
la tsani
[email protected]
English, French
la xorxes
[email protected]
English, Spanish
la guskant
[email protected]
English, French, Chinese, Japanese, Esperanto
la remod
[email protected]
English, Italian

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

What's next?

  • Try your hand at translating into Lojban, or write your own original texts: Poetry, prose, blogs, tweets, etc.
  • Continue learning vocabulary using memorization software.
  • Help expand the dictionary by translating Lojban words into other languages, or coin new compound words and add them.

More info ...

This web site is dedicated to documenting Lojban and the activities of the Lojban-using community, and also serves as the official web site 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.
Quick Links

From Lojban news...

Community news

24 September 2018

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


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.

On the Internet


@RA_Hellinger ⬡

Nur weil sich das eine (noch) nicht durchgesetzt hat, ist das andere nicht alternativlos. Warum tippen wir qwert...

2019-07-11 09:13:05
@fotono guskant sunolili

EPUB3 book with Media Overlays in @LanguageCrawler LanguageCrawler

Constructed languages | Language creation

2017-03-26 14:33:28

Google Groups: lojban

Re: [lojban] As long as I'm sharing old stuff...

Oh, hey:
Robin Lee Powell 2020-01-15 06:01:55
As long as I'm sharing old stuff... has some things in it people might not know about, in particular the shared translations at

Robin Lee Powell 2020-01-15 05:52:28

GoogleGroups: lojban-beginners

Come make comments & suggestions

The Members Meeting of the Logical Language Group (LLG) which supports lojban, its users, and it's learners, is starting tomorrow! Please join us. Anyone is welcome to participate. Now is your chan...
[email protected] 2019-10-19 23:53:13
Announcing the 2019 LLG Members Meeting
Everyone interested in lojban (and /or logical languages in general) is welcome to join us! The 2019 Logical Language Group (LLG) Members Meeting will be starting between October 15th and October 2...

[email protected] 2019-09-28 07:05:43

GoogleGroups: bpfk-list

Please join the Members Meeting

PLEASE NOTE The Members Meeting of the Logical Language Group (LLG) which supports lojban, its users, and it's learners, is starting tomorrow! That's October 20, 2019. Please join us. Anyone is wel...
karis 2019-10-20 17:42:59
Re: Officially updating "Complete Lojban Language" grammar book. An official LLG proposal passed. Your help needed.
So here is the list of veto votes. Please, inform me if Iforgot to include any other veto votes. Em sábado, 29 de junho de 2019 11:39:14 UTC+3, la gl...

la gleki 2019-08-27 12:30:42

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