Esperantopedia

Phrases

Esperanto slang and in-group words: krokodili, kabei, mojosa

The informal words, jokes and abbreviations Esperanto speakers use, but beginner courses leave out.

Updated: 3 min read

Esperanto slang is the informal vocabulary that speakers made for themselves: krokodili "to speak another language among Esperantists", kabei "to quit the movement", samideano "fellow Esperantist" and mojosa "cool". Courses rarely teach these words, but you will meet them at congresses, in groups and in chat. Most are built from regular word parts such as -ul-, -ism- and -aĵ- (see suffixes), so you can often guess them. Pronunciation guides show the stressed syllable in capitals.

Words for the community

EsperantoMeaningOrigin / note
Esperantujo (es-pe-ran-TU-jo)the "land" of Esperanto: the community and every place it meets, from congresses to online groupsEsperanto + -ujo, as in country names (Francujo). Also written Esperantio. It has no territory.
samideano (sa-mi-de-A-no)fellow Esperantist; a friendly way to address onesama "same" + ideo "idea" + -ano "member". Zamenhof used it in congress speeches.
esperantisto (es-pe-ran-TIS-to)someone who knows and uses EsperantoSome prefer esperantoparolanto "Esperanto speaker", because -isto can suggest a profession or ideology.
verdulo (ver-DU-lo)a keen Esperantistverda "green" + -ulo "person"; green is the movement's colour. It also means a member of a Green party.
denaskulo (de-nas-KU-lo)native speaker: someone who learned Esperanto as a child at homedenaska "from birth" + -ulo. See native speakers.
interna ideo (in-TER-na i-DE-o)"inner idea": the hope that Esperanto will bring peoples closer like brothersZamenhof's phrase, used in speeches, for example at the Kraków congress in 1912.

Words about using the language

EsperantoMeaningOrigin / note
krokodili (kro-ko-DI-li)to speak a language other than Esperanto among Esperantists, usually your shared native onekrokodilo "crocodile" + -i. The origin is uncertain; one story is a wooden crocodile in Andreo Cseh's classes.
aligatori, kajmani, gavialirarer cousins. Aligatori: another language that only some present speak natively. Kajmani: one that nobody present speaks natively. Gaviali: using Esperanto where another language would suit betterMore reptiles, copying krokodili. The exact definitions vary.
kabei (ka-BE-i)to leave the Esperanto movement after having been active in itFrom the pen name Kabe of Kazimierz Bein; see below.
volapukaĵo (vo-la-pu-KA-ĵo)gibberish; something you cannot understandVolapuko + -aĵo "thing". A joke about Volapük, an earlier planned language (1879) that competed with Esperanto.
bonantagulo (bo-nan-ta-GU-lo)teasing word for someone whose Esperanto is only a few greetingsbonan tagon + -ulo. It can sound unkind, so use it carefully.
mojosa (mo-JO-sa)cool, great, stylish; mostly heard from younger speakersMade up in 2003 at a youth seminar in Hungary from the first letters of modern-jun-stil "modern-young-style": M, J, S, spoken mo-jo-so. Also mojosega "very cool".

Words about the movement's goals

EsperantoMeaningOrigin / note
fina venko (FI-na VEN-ko)"final victory": the hope that one day most people will speak Esperanto as a second languageOften written Fina Venko.
finvenkismo, finvenkisto (fin-ven-KIS-mo, fin-ven-KIS-to)working towards that goal; a person who holds this aimfina venko + -ismo "doctrine" or -isto.
raŭmismo (raŭ-MIS-mo)the view that Esperanto is valuable now, as a living language and cultural community, not only as a future world languageFrom the Rauma Manifesto, written in 1980 in Rauma, Finland. Often set against finvenkismo; see criticism.
zamenhofa (za-men-HO-fa)of Zamenhof; in line with his own usage and examplesPMEG calls the examples it takes from his texts zamenhofaj.

Events and places

EsperantoMeaningOrigin / note
gufujo (gu-FU-jo)a quiet night café at Esperanto events: candles, tea instead of alcohol, no smoking, music or readingsgufo "(eagle-)owl", for night owls, + -ujo. First held at the end of 1995 at a German youth New Year seminar.
UK (u-KO)the World Esperanto Congress, Universala KongresoSee World Esperanto Congress.
IJKthe International Youth Congress, Internacia Junulara KongresoHeld by TEJO; the first was in 1938 in Groet, Netherlands.
Pasporta Servo (pas-POR-ta SER-vo)"Passport Service": a list of hosts who offer free beds to Esperanto-speaking travellersSince 1974, with 40 hosts at first. See Pasporta Servo.

Abbreviations in writing and chat

EsperantoMeaningOrigin / note
ktp, k.t.p."and so on"kaj tiel plu. PMEG writes it with dots.
ekz."for example"ekzemple.
k.a., k.s."and others", "and similar"kaj aliaj, kaj similaj.
t.e."that is"tio estas.
bv, bv."please"bonvolu, in messages and chat.
s-ro, s-ino, d-ro"Mr", "Ms", "Dr"sinjoro, sinjorino, doktoro.

Casual greetings such as Sal!, Ĉaŭ! and Ĝis! are in greetings. Keyboards without ĉ ĝ ĥ ĵ ŝ ŭ are why chats often type cx, gx and so on; see the x-system.

Who was Kabe, and why did his name become a verb?

Kabe was the pen name of Kazimierz Bein (1872–1959), a Polish eye doctor and a leading early Esperanto translator and stylist. The name is the Polish way of saying his initials, K.B. He took up the language in 1903, became famous in 1904 for translating Sieroszewski's novel La fundo de l' mizero, and was vice-president of the Academy of Esperanto from 1906. His translation of Prus's La Faraono followed in 1907.

In 1911 he left the movement suddenly, without explaining why. In a 1931 interview he said that the language's lack of progress meant he no longer saw it as the answer. Esperantists made kabei from his name, and by 1935 the poet Kálmán Kalocsay wrote, in the Enciklopedio de Esperanto, that it had become a symbol of apostasy.

The slang in sentences

EsperantoEnglish
Ni krokodilis la tutan vesperon.We spoke our own language all evening.
La koncerto estis mojosega!The concert was really cool!
Tiu instrukcio estas por mi volapukaĵo.That instruction is gibberish to me.
Ni renkontiĝu en la gufujo post la koncerto.Let's meet in the gufujo after the concert.
Ĝis, samideanoj!See you, fellow Esperantists!

When should you use this slang?

  • Among friends, at events and in chat. In formal writing, prefer standard words and the basic phrases.
  • Explain the word if unsure. Many older speakers have never met mojosa.
  • Don't police others. Vikipedio notes that scolding beginners with Ne krokodilu! can drive them away. Briefly switching language to explain a grammar point to a beginner is more accepted.

Common questions

What does krokodili mean in Esperanto?

It means speaking a language other than Esperanto among Esperantists, usually your shared native language. Speakers discourage it because events are a rare chance to practise, and it can leave others out and give outsiders a poor impression.

What does kabei mean?

Kabei means to leave the Esperanto movement after having been an active member. It comes from Kabe, the pen name of Kazimierz Bein, a leading translator who quit in 1911.

What does mojosa mean?

Mojosa means "cool". It was coined in 2003 from the first letters of modernjunstila "modern-young-style", and is now listed in the online dictionary ReVo.

What is a gufujo?

A gufujo is a quiet, candle-lit night café at Esperanto events, with tea instead of alcohol. The first was held at the end of 1995; gufo means "owl".

What is Esperantujo?

Esperantujo is the informal name for the Esperanto-speaking world, its community and meeting places, treated as if it were a country. It is also called Esperantio.

Sources

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