Esperantismo and the Interna Ideo: What Esperanto Is For
By Michael McGettrickUpdated 12 October 2026
has a written statement of what it is for, adopted on 9 August 1905: the Declaration of Boulogne. It says the movement spreads a neutral language, and that everything else is private. A year later Zamenhof named something more, . Both are in his own words, and this page sets them side by side.
| Text | Year | What it says |
|---|---|---|
| Boulogne Declaration | 1905 | spread a neutral language; the rest is private |
| a speech | 1906 | names and refuses to drop it |
| Cambridge speech | 1907 | the neutrality clause was there to reassure |
| Kraków speech | 1912 | defines the idea, binding on nobody; title given up |
Quick check
Now use it: three quick questions on the chart above. The full practice is further down.
Spot the mistake
0/3Tap the word that is wrong.
Zamenhof's own creed, homaranismo, and the later argument between fina venko and Raŭmo have their own pages.
esperantismo, esperantisto: -ism- and -ist-
The title words are built, and the suffix tells you what kind of thing each one is. -- makes a doctrine or movement; -- makes the person who follows it, or does it as a job; -- makes a member.
| Word | The suffix makes | Meaning |
|---|---|---|
| a movement | |
| its person | an |
| a doctrine | |
| an adherent | a communist |
| a job | a |
| a member | a fellow |
.- Esperantism is a movement..- She is an Esperantist.
A follows a doctrine; a does a job. The Declaration (below) makes an neither: just someone who uses the language.
The Declaration of Boulogne, point by point
Its full title is Deklaracio . The first congress adopted it on 9 August 1905, on Zamenhof's proposal, because, says its preamble, many people had an , a very false idea, about what Esperantism is.
| Point | What it says | Key phrase |
|---|---|---|
| 1 | the definition, and a private-affair clause | |
| 2 | is the one finished, tested language | |
| 3 | nobody owns it | nenies o |
| 4 | no personal lawgiver; the binds | |
| 5 | an is anyone who uses it | |
Point 1: the definition, and the door it closes
i on ...Esperantism is an endeavour to spread throughout the world the use of a neutrally human language...
- Declaration of Boulogne, point 1, 1905
The same point ends:
, , , .Every other idea or hope which this or that Esperantist associates with Esperantism will be his purely private affair, for which Esperantism is not answerable.
There is no separate point about neutrality. The famous disclaimer is a clause tacked to the end of the definition.
Points 3 and 4: nobody's property, nobody's lawgiver
Point 3 gives a reason, and the grammar shows it: (because) the author renounced every personal right, (therefore) the language is:
"nenies o", , ."nobody's property", neither materially nor morally.
- Declaration of Boulogne, point 3, 1905
Nenies is the correlative for nobody's, as is whose (the correlative table).
Point 4 opens leĝdonanton, Esperanto has no personal lawgiver. Then it demotes its own author: the creator's opinions and works are , absolutely private and binding on nobody. Only the binds (a story of its own).
Point 5: who counts
nomata , .Anyone is called an Esperantist who knows and uses the language Esperanto, quite regardless of the purposes he uses it for.
Joining a society is a, , recommendable but not obligatory. No oath, no register, no belief.
The stanza Boulogne did not hear
Zamenhof ended his opening speech at Boulogne with a poem, , Prayer under the green banner. He recited stanzas 1 to 5. The sixth, on the three Abrahamic faiths, was left out at the organisers' insistence:
, mahometanoj, / .Christians, Hebrews or Muslims, we are all children of God.
- Zamenhof,
, sixth stanza
The usual explanation is the antisemitism of the Dreyfus years in France. The stanza reached print in 1906, but Zamenhof never printed it in his Krestomatio, so few readers know it.
Two words date it. Mahometanoj is the old word; today a Muslim is an . And is with its -o cut for the , the apostrophe poetry allows.
La interna ideo: Geneva, 1906
The phrase is not in the Declaration. Zamenhof named it at the second congress, in Geneva in August 1906:
, .But for our work to bear fruit, we must above all make clear to ourselves the internal idea of Esperantism.
- Zamenhof, Geneva, 1906
The context was a pogrom. In June 1906 Białystok, his home town, had seen people with axes and iron bars attack their neighbours for speaking another language and holding another faith. He said so from the platform: , terribly high and thick are still the walls between peoples.
Some Esperantists now said the language should never be linked with any idea, even privately. His answer: , , , !, oh no, no, never! His short name for the idea was o o , brotherhood and justice among all peoples. He still granted every Esperantist the right , to see in Esperanto only a language.
- nur lingvoallowed to everyone
- la interna ideonamed 1906, binding on nobody
- homaranismoZamenhof’s private creed
At Cambridge in 1907 he explained why the clause existed: many people would not learn the language for fear of being taken for partisans of the idea, so the Declaration said otherwise , so as not to frighten the great masses away.
Kraków, 1912: the idea defined, the title refused
The definition everyone quotes is from Kraków, the eighth congress and the language's twenty-fifth anniversary. The speech opens :
, , , , , : alkutimigadi , o .The internal idea of Esperanto, which carries absolutely no obligation for any individual Esperantist, but which, as you know, fully reigns and must always reign at the Esperanto congresses, is: on a neutral linguistic foundation to remove the walls between the peoples and to accustom people so that each of them sees in his neighbour only a human being and a brother.
is a line from his own poem , first printed in 1890 and sung today as the movement's anthem. The definition's long words are built:
| Word | Pieces | Meaning |
|---|---|---|
alkutimigadi | + + -- + -- | to keep accustoming |
| + -- | a neighbour |
privataĵo | + -- | a private matter |
The next sentence fences it off: , , o, everything beyond that internal idea is only a private matter.
Then he gave up the title:
, "", .I ask you to stop, from this moment, seeing a "master" in me, to stop honouring me with that title.
- Zamenhof, Kraków, 1912
His reason: - , , if someone dislikes my person or my political and religious principles, he becomes an enemy of Esperanto. Anyone, he said, could call what he did o Zamenhof, an entirely private idea or folly of Zamenhof's. To the old motto , he added a word: konkordo, concord.
It was not a sudden reversal. Point 4 of the 1905 Declaration had already made all his opinions , binding on nobody.
Mistakes English speakers make
| Wrong | Right | Why |
|---|---|---|
(her) | (her) | the person takes --; -- is the movement |
o | nenies o | for nobody's, use nenies; o is no property at all |
| | a plural noun needs |
What to do next
- Read point 5 aloud, then say who counts as an Esperantist in your own words.
- Read homaranismo, the creed Zamenhof kept apart.
- Read fina venko and Raŭmo, the argument that followed.
See also
- Homaranismo - Zamenhof's private creed, and why he kept it off the movement's books.
- Fina venko and raŭmismo - the modern argument about what the movement is for.
- Who decides what is correct Esperanto - point 4 and the
. - The history of Esperanto - Boulogne, Geneva and Kraków in sequence.
- Esperanto and the religions - the faiths that took up a neutral language.
- La kongreso - the congresses where the idea was said to reign.
- esperantismo - the word, and how
--builds it.