Ido Language
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Ido () is a
constructed language A constructed language (shortened to conlang) is a language whose phonology, grammar, orthography, and vocabulary, instead of having developed natural language, naturally, are consciously devised for some purpose, which may include being devise ...
derived from a reformed version of
Esperanto Esperanto (, ) is the world's most widely spoken Constructed language, constructed international auxiliary language. Created by L. L. Zamenhof in 1887 to be 'the International Language' (), it is intended to be a universal second language for ...
, and designed similarly with the goal of being a universal second language for people of diverse languages. To function as an effective ''international auxiliary language'', Ido was designed specifically to be grammatically, orthographically, and lexicographically regular (and, above all, easy to learn and use). It is the most successful of the many
Esperanto Esperanto (, ) is the world's most widely spoken Constructed language, constructed international auxiliary language. Created by L. L. Zamenhof in 1887 to be 'the International Language' (), it is intended to be a universal second language for ...
derivatives, known as '' Esperantidoj.'' Ido was created in 1907 due to a desire to reform the perceived flaws of Esperanto, a language that had been created 20 years earlier to facilitate international communication. The name comes from the Esperanto word ', meaning "offspring", since the language is a derivative of Esperanto. After its inception, Ido was endorsed by some of the Esperanto community. A setback occurred with the sudden death in 1914 of one of its most influential proponents, Louis Couturat. In 1928, promoter
Otto Jespersen Jens Otto Harry Jespersen (; 16 July 1860 – 30 April 1943) was a Danish linguist who worked in foreign-language pedagogy, historical phonetics, and other areas, but is best known for his description of the grammar of the English language. Ste ...
quit the movement for his own language Novial. The popularity of Ido decreased for two reasons: the emergence of further schisms developing from competing reform projects, and a general lack of awareness of Ido as a candidate for an international language. It was not until the spread of the Internet that it began to regain popularity. Ido uses the same 26 letters as the English (Latin) alphabet, with no
diacritic A diacritic (also diacritical mark, diacritical point, diacritical sign, or accent) is a glyph added to a letter or to a basic glyph. The term derives from the Ancient Greek (, "distinguishing"), from (, "to distinguish"). The word ''diacrit ...
s. It draws its vocabulary from English, French, German, Italian, Latin, Russian, Spanish and Portuguese, and is largely intelligible to those who have studied Esperanto. Several works of literature have been translated into Ido, including '' The Little Prince'', the Book of Psalms, and the
Gospel of Luke The Gospel of Luke is the third of the New Testament's four canonical Gospels. It tells of the origins, Nativity of Jesus, birth, Ministry of Jesus, ministry, Crucifixion of Jesus, death, Resurrection of Jesus, resurrection, and Ascension of ...
. As of the year 2000, there were approximately 100–200 Ido speakers in the world.Blanke (2000), cited in Sabine Fiedle
"Phraseology in planned languages"
, ''Phraseology / Phraseologie,'' Walter de Gruyter 2007. pp. 779.
As of 2022, Ido has 26 speakers in
Finland Finland, officially the Republic of Finland, is a Nordic country in Northern Europe. It borders Sweden to the northwest, Norway to the north, and Russia to the east, with the Gulf of Bothnia to the west and the Gulf of Finland to the south, ...
, according to Statistics Finland.


History

The idea of a universal second language is not new, and constructed languages are not a recent phenomenon. During the 12th century
Hildegard of Bingen Hildegard of Bingen Benedictines, OSB (, ; ; 17 September 1179), also known as the Sibyl of the Rhine, was a German Benedictines, Benedictine abbess and polymath active as a writer, composer, philosopher, Christian mysticism, mystic, visiona ...
invented a set of words known as the
Lingua Ignota A ''lingua ignota'' (Latin for "unknown language") was described by the 12th-century abbess Hildegard of Bingen, who apparently used it for mystical purposes. It consists of vocabulary with no known grammar; the only known text is individual ...
. The concept did not attract significant interest until the language Volapük was created in 1879. Volapük was popular for some time and apparently had a few thousand users, but was later eclipsed by the popularity of
Esperanto Esperanto (, ) is the world's most widely spoken Constructed language, constructed international auxiliary language. Created by L. L. Zamenhof in 1887 to be 'the International Language' (), it is intended to be a universal second language for ...
, which was created in 1887. Several other languages, such as
Latino sine Flexione Latino sine flexione ("Latin without inflections"), Interlingua de Academia pro Interlingua (IL de ApI) or Peano's Interlingua (abbreviated as IL) is an international auxiliary language compiled by the Academia pro Interlingua under the chairmansh ...
and
Idiom Neutral Idiom Neutral is an international auxiliary language, published in 1902 by the International Academy of the Universal Language () under the leadership of Waldemar Rosenberger, a St. Petersburg engineer. History The Academy had its origin a ...
were also proposed. It was during this time that French mathematician Louis Couturat formed the '' Delegation for the Adoption of an International Auxiliary Language''. This delegation made a formal request to the International Association of Academies in
Vienna Vienna ( ; ; ) is the capital city, capital, List of largest cities in Austria, most populous city, and one of Federal states of Austria, nine federal states of Austria. It is Austria's primate city, with just over two million inhabitants. ...
to select and endorse an international language; the request was rejected in May 1907. The Delegation then met as a Committee in Paris in October 1907 to discuss the adoption of a standard international language. Among the languages considered was a new language submitted anonymously after the Committee's deadline by someone using the name ''Ido''. In the end the committee, always without plenary sessions and consisting of only 12 members, concluded the last day with 4 votes for and 1 abstention. They concluded that no language was completely acceptable, but that Esperanto could be accepted "on condition of several modifications to be realized by the permanent Commission in the direction defined by the conclusions of the Report of the Secretaries ouis Couturat and Léopold Leau">Léopold_Leau.html" ;"title="ouis Couturat and Léopold Leau">ouis Couturat and Léopold Leauand by the Ido project". Esperanto's inventor, L. L. Zamenhof, having heard a number of complaints, had suggested in 1894 1894 Esperanto reform project, a proposal for a reformed Esperanto with several changes that Ido adopted: eliminating the accented letters and the
accusative case In grammar, the accusative case ( abbreviated ) of a noun is the grammatical case used to receive the direct object of a transitive verb. In the English language, the only words that occur in the accusative case are pronouns: "me", "him", "he ...
, changing the plural to an Italianesque ''-i'', and replacing the table of correlatives with more Latinate words. However, the Esperanto community voted and rejected Zamenhof's reformed Esperanto, and likewise most rejected the recommendations of the 1907 Committee composed nominally of 12 members. Zamenhof, undoubtedly reminiscent of his experience of the 1894 reforms, strongly supported the Esperanto Committee majority decision. Furthermore, controversy ensued when the "Ido project" was found to have been devised mainly by Louis de Beaufront, whom Zamenhof had chosen to represent Esperanto to the committee (Zamenhof himself could not represent Esperanto as the committee's rules dictated that the creator of a submitted language could not defend it). The Committee's meetings were performed mainly in French, with occasional German. When the president of the Committee asked who was the author of Ido's project, Couturat, de Beaufront and Leau answered that they were not. De Beaufront presented Ido's project and gave a description of it as a better, richer version of Esperanto. Couturat, Leau, de Beaufront and Jespersen were finally the only members who voted, all of them for Ido's project. A month later, Couturat accidentally forwarded Jespersen a copy of a letter in which he acknowledged that de Beaufront was the author of the Ido project. Jespersen was angered by this and asked for a public confession. De Beaufront procrastinated for four months before making a public confession. It is estimated that some 20% of Esperanto's major promoters and 3–4% of ordinary Esperantists switched to Ido, which from then on suffered constant modifications seeking to perfect it, but which ultimately had the effect of causing many Ido speakers to abandoned trying to learn it. Although it divided the Esperanto movement, the schism gave the remaining Esperantists the freedom to concentrate on using and promoting their language as it was. At the same time, it gave the Idists freedom to continue working on their own language for several more years before actively promoting it. The ''Uniono di la Amiki di la Linguo Internaciona'' (''Union of Friends of the International Language'') was established along with an Ido Academy to develop the details of the new language. Couturat, who was the main proponent of Ido, was killed in an automobile accident in 1914. This, along with
World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
, practically suspended the activities of the Ido Academy from 1914 to 1920. In 1928 Ido's major intellectual promoter, the Danish linguist
Otto Jespersen Jens Otto Harry Jespersen (; 16 July 1860 – 30 April 1943) was a Danish linguist who worked in foreign-language pedagogy, historical phonetics, and other areas, but is best known for his description of the grammar of the English language. Ste ...
, published his own planned language, Novial and ended his promotion of Ido.


Digital era

The language still has active speakers, numbering about 500. The Internet has caused a renewal of interest in the language during recent years. A sample of 24 Idists on the
Yahoo! Yahoo (, styled yahoo''!'' in its logo) is an American web portal that provides the search engine Yahoo Search and related services including My Yahoo, Yahoo Mail, Yahoo News, Yahoo Finance, Yahoo Sports, y!entertainment, yahoo!life, and its a ...
group ''Idolisto'' during November 2005 showed that 57% had begun their studies of the language during the preceding three years, 32% from the mid-1990s to 2002, and 8% had known the language from before.


Changes

Few changes have been made to Ido since 1922. Camiel de Cock was named secretary of linguistic issues in 1990, succeeding Roger Moureaux. He resigned after the creation of a linguistic committee in 1991. De Cock was succeeded by Robert C. Carnaghan, who had the title from 1992 to 2008. No new words were adopted between 2001 and 2006. After the 2008–2011 elections of ULI's direction committee, Gonçalo Neves replaced Carnaghan as secretary of linguistic issues during February 2008. Neves resigned during August 2008. A new linguistic committee was formed in 2010. In April 2010, Tiberio Madonna was appointed as secretary of linguistic issues, succeeding Neves. In January 2011, ULI approved eight new words. This was the first addition of words in many years. After a series of severe conflicts with the Directing Committee of ULI, Tiberio Madonna was revoked as secretary of linguistic issues on the 26th of May 2013 by official announcement from Loïs Landais, the secretary of ULI. During January 2022, ULI approved a set of new words (34)


Phonology

Ido has five vowel
phoneme A phoneme () is any set of similar Phone (phonetics), speech sounds that are perceptually regarded by the speakers of a language as a single basic sound—a smallest possible Phonetics, phonetic unit—that helps distinguish one word fr ...
s. The values and are interchangeable depending on speaker preference, as are and . The orthographic sequences and indicate
diphthong A diphthong ( ), also known as a gliding vowel or a vowel glide, is a combination of two adjacent vowel sounds within the same syllable. Technically, a diphthong is a vowel with two different targets: that is, the tongue (and/or other parts of ...
s in word roots but not when created by affixing. All polysyllabic words are stressed on the second-to-last syllable except for verb
infinitive Infinitive ( abbreviated ) is a linguistics term for certain verb forms existing in many languages, most often used as non-finite verbs that do not show a tense. As with many linguistic concepts, there is not a single definition applicable to all ...
s, which are stressed on the last syllableskolo, kafeo and lernas for "school", "coffee" and the present tense of "to learn", but irar, savar and drinkar for "to go", "to know" and "to drink". If an i or u precedes another vowel, the pair is considered part of the same syllable when applying the accent rulethus radio, familio and manuo for "radio", "family" and "hand", unless the two vowels are the only ones in the word, in which case the "i" or "u" is stressed: dio, frua for "day" and "early".


Orthography

Ido uses the same 26 letters as the
English alphabet Modern English is written with a Latin-script alphabet consisting of 26 Letter (alphabet), letters, with each having both uppercase and lowercase forms. The word ''alphabet'' is a Compound (linguistics), compound of ''alpha'' and ''beta'', t ...
and
ISO Basic Latin alphabet The ISO basic Latin alphabet is an international standard (beginning with ISO/IEC 646) for a Latin-script alphabet that consists of two sets (uppercase and lowercase) of 26 letters, codified in various national and international standards and u ...
with three digraphs and no ligatures or
diacritics A diacritic (also diacritical mark, diacritical point, diacritical sign, or accent) is a glyph added to a letter or to a basic glyph. The term derives from the Ancient Greek (, "distinguishing"), from (, "to distinguish"). The word ''diacrit ...
. Where the table below lists two pronunciations, either is perfectly acceptable. The digraphs are:


Grammar

The definite article is ''la'' and is invariable. The indefinite article (a/an) does not exist in Ido. Each word in the Ido vocabulary is built from a root word. A word consists of a root and a grammatical ending. Other words can be formed from that word by removing the grammatical ending and adding a new one, or by inserting certain
affix In linguistics, an affix is a morpheme that is attached to a word stem to form a new word or word form. The main two categories are Morphological derivation, derivational and inflectional affixes. Derivational affixes, such as ''un-'', ''-ation' ...
es between the root and the grammatical ending. Some of the grammatical endings are defined as follows: These are the same as in Esperanto except for ''-i'', ''-ir'', ''-ar'', ''-or'' and ''-ez''. Esperanto marks noun plurals by an ''agglutinative'' ending ''-j'' (so plural nouns end in ''-oj''), uses ''-i'' for verb infinitives (Esperanto infinitives are tenseless), and uses ''-u'' for the imperative. Verbs in Ido, as in Esperanto, do not conjugate depending on person, number or gender; the -as, -is, and -os endings suffice whether the subject is I, you, he, she, they, or anything else. For the word "to be," Ido allows either ''esas'' or ''es'' in the present tense; however, the full forms must be used for the past tense ''esis'' and future tense ''esos''." Adjectives and adverbs are compared in Ido by means of the words ''plu'' = more, ''maxim'' = most, ''min'' = less, ''minim'' = least, ''kam'' = than/as. There exist in Ido three categories of adverbs: the simple, the derived, and the composed. The simple adverbs do not need special endings, for example: ''tre'' = very, ''tro'' = too, ''olim'' = formerly, ''nun'' = now, ''nur'' = only. The derived and composed adverbs, not being originally adverbs but derived from nouns, adjectives and verbs, have the ending -e.


Syntax

Ido word order is generally the same as English ( subject–verb–object), so the sentence ''Me havas la blua libro'' is the same as the English "I have the blue book", both in meaning and word order. There are a few differences, however: * Adjectives can precede the noun as in English, or follow the noun as in Spanish. Thus, ''Me havas la libro blua'' means the same thing. * Ido has the
accusative In grammar, the accusative case (abbreviated ) of a noun is the grammatical case used to receive the direct object of a transitive verb. In the English language, the only words that occur in the accusative case are pronouns: "me", "him", "her", " ...
suffix ''-n''. Unlike Esperanto, this suffix is only required when the object of the sentence is not clear, for example, when the subject-verb-object word order is not followed. Thus, ''La blua libron me havas'' also means the same thing. Ido generally does not impose rules of grammatical agreement between grammatical categories within a sentence. For example, the verb in a sentence is invariable regardless of the number and person of the subject. Nor must the adjectives be pluralized as well the nounsin Ido ''the large books'' would be ''la granda libri'' as opposed to the Esperanto ''la grandaj libroj''. Negation occurs in Ido by simply adding ne before a verb: Me ne havas libro means "I do not have a book". This as well does not vary, and thus the "I do not", "He does not", "They do not" before a verb are simply Me ne, Il ne, and Li ne. In the same way, past tense and future tense negatives are formed by ne before the conjugated verb. "I will not go" and "I did not go" become Me ne iros and Me ne iris respectively. Yes/no questions are formed by the particle ka in front of the question. "I have a book" (me havas libro) becomes Ka me havas libro? (do I have a book?). Ka can also be placed in front of a noun without a verb to make a simple question, corresponding to the English "is it?" Ka Mark? can mean, "Are you Mark?", "Is it Mark?", "Do you mean Mark?" depending on the context.


Pronouns

The
pronoun In linguistics and grammar, a pronoun (Interlinear gloss, glossed ) is a word or a group of words that one may substitute for a noun or noun phrase. Pronouns have traditionally been regarded as one of the part of speech, parts of speech, but so ...
s of Ido were revised to make them more distinct acoustically than those of Esperanto, which all end in ''i''. Especially the singular and plural first-person pronouns ''mi'' and ''ni'' may be difficult to distinguish in a noisy environment, so Ido has ''me'' and ''ni'' instead. Ido also distinguishes between intimate (''tu'') and formal (''vu'') second-person singular pronouns as well as plural second-person pronouns (''vi'') not marked for intimacy. Furthermore, Ido has a pan-gender third-person pronoun ''lu'' (it can mean "he", "she", or "it", depending on the context) in addition to its masculine (''il''), feminine (''el''), and neuter (''ol'') third-person pronouns. # ''ci'', although technically the familiar form of the word "you" in Esperanto, is seldom used. Esperanto's inventor himself did not include the pronoun in the first book on Esperanto and only later reluctantly; later he recommended against using ''ci'' because different cultures have conflicting traditions regarding the use of the familiar and formal forms of "you". #''ri'', ''iŝi'', ''iĝi'' and by extension ''iri'' are proposed neologisms and are rare, but they are still used albeit seldom. ''ol'', like English ''it'' and Esperanto ''ĝi'', is not limited to inanimate objects, but can be used "for entities whose sex is indeterminate: ''babies, children, humans, youths, elders, people, individuals, horses, attle cats,'' etc." ''Lu'' is often mistakenly labeled an epicene pronoun, that is, one that refers to both masculine and feminine beings, but in fact, ''lu'' is more properly a "pan-gender" pronoun, as it is also used for referring to inanimate objects. From ''Kompleta Gramatiko Detaloza di la Linguo Internaciona Ido'' by Beaufront:


Table of correlatives

Ido makes correlatives by combining entire words together and changing the word ending, with some irregularities to show distinction. # The initial ''i'' can be omitted: ''ta'', ''to'', ''ti'', ''ta''. # One can omit the initial ''a'': ''ultempe'', ''nultempe'', ''ulspeca'', ''nulspeca'', ''ulmaniere'', ''nulmaniere''. # ''omnatempe'' is correct and usable, but ''sempre'' is the actual word. # Instead of ''irga quanto'', ''nula quanto'' and ''la tota quanto'' one usually says ''irgo'', ''nulo'' and ''omno''.


Compound formation

Composition in Ido obeys stricter rules than in Esperanto, especially formation of nouns, adjectives and verbs from a radical of a different class. The reversibility principle assumes that for each composition rule (affix addition), the corresponding decomposition rule (affix removal) is valid. Hence, while in Esperanto an adjective (for instance ), formed on the noun radical , can mean an attribute ( "paper-made encyclopedia") and a relation ( "paper-making factory"), Ido will distinguish the attribute ("paper" or "of paper" (not "paper-made" exactly)) from the relation ("paper-making"). Similarly, means in both Esperanto and Ido the noun "crown"; where Esperanto allows formation of "to crown" by simply changing the ending from noun to verb ("crowning" is ), Ido requires an affix so the composition is reversible: ("the act of crowning" is ). According to Claude Piron, some modifications brought by Ido are in practice impossible to use and ruin spontaneous expression:
Ido displays, on linguistic level, other drawbacks Esperanto succeeded to avoid, but I don't have at hand documents which would allow me to go further in detail. For instance, if I remember correctly, where Esperanto only has the suffix *, Ido has several: **, **, **, which match subtleties which were meant to make language clearer, but that, in practice, inhibit natural expression.


Vocabulary

Vocabulary in Ido is derived from French, Italian, Spanish, English, German, and Russian. Basing the vocabulary on various widespread languages was intended to make Ido as easy as possible for the greatest number of people possible. Early on, the first 5,371 Ido word roots were analyzed compared to the vocabulary of the six source languages, and the following result was found: * 2024 roots (38%) belong to 6 languages * 942 roots (17%) belong to 5 languages * 1111 roots (21%) belong to 4 languages * 585 roots (11%) belong to 3 languages * 454 roots (8%) belong to 2 languages * 255 roots (5%) belong to 1 language Another analysis showed that: * 4880 roots (91%) are found in French * 4454 roots (83%) are found in Italian * 4237 roots (79%) are found in Spanish * 4219 roots (79%) are found in English * 3302 roots (61%) are found in German * 2821 roots (52%) are found in Russian Vocabulary in Ido is often created through a number of official prefixes and suffixes that alter the meaning of the word. This allows a user to take existing words and modify them to create
neologism In linguistics, a neologism (; also known as a coinage) is any newly formed word, term, or phrase that has achieved popular or institutional recognition and is becoming accepted into mainstream language. Most definitively, a word can be considered ...
s when necessary, and allows for a wide range of expression without the need to learn new vocabulary each time. Though their number is too large to be included in one article, some examples include: *The diminutive suffix -et-. Domo (house) becomes dometo (cottage), and libro (book) becomes libreto (novelette or short story). *The pejorative suffix -ach-. Domo becomes domacho (hovel), and libro becomes libracho (a shoddy piece of work, pulp fiction, etc.) *The prefix retro-, which implies a reversal. Irar (to go) becomes retroirar (to go back, backward) and venar (to come) becomes retrovenar (to return). New vocabulary is generally created through an analysis of the word, its
etymology Etymology ( ) is the study of the origin and evolution of words—including their constituent units of sound and meaning—across time. In the 21st century a subfield within linguistics, etymology has become a more rigorously scientific study. ...
, and reference to the six source languages. If a word can be created through vocabulary already existing in the language then it will usually be adopted without need for a new radical (such as wikipedio for ''Wikipedia'', which consists of wiki + enciklopedio for ''encyclopedia''), and if not then an entirely new word will be created. The word alternatoro for example was adopted in 1926, likely because five of the six source languages used largely the same
orthography An orthography is a set of convention (norm), conventions for writing a language, including norms of spelling, punctuation, Word#Word boundaries, word boundaries, capitalization, hyphenation, and Emphasis (typography), emphasis. Most national ...
for the word, and because it was long enough to avoid being mistaken for other words in the existing vocabulary. Adoption of a word is done through consensus, after which the word will be made official by the union. Care must also be taken to avoid
homonym In linguistics, homonyms are words which are either; '' homographs''—words that mean different things, but have the same spelling (regardless of pronunciation), or '' homophones''—words that mean different things, but have the same pronunciat ...
s if possible, and usually a new word undergoes some discussion before being adopted. Foreign words that have a restricted sense and are not likely to be used in everyday life (such as the word '' intifada'' to refer to the conflict between
Israel Israel, officially the State of Israel, is a country in West Asia. It Borders of Israel, shares borders with Lebanon to the north, Syria to the north-east, Jordan to the east, Egypt to the south-west, and the Mediterranean Sea to the west. Isr ...
and
Palestine Palestine, officially the State of Palestine, is a country in West Asia. Recognized by International recognition of Palestine, 147 of the UN's 193 member states, it encompasses the Israeli-occupied West Bank, including East Jerusalem, and th ...
) are left untouched, and often written in italics. Ido, unlike Esperanto, does not assume the male sex by default. For example, Ido does not derive the word for "waitress" by adding a feminine suffix to "waiter", as Esperanto does. Instead, Ido words are defined as sex-neutral, and two different suffixes derive masculine and feminine words from the root: ' for a waiter of either sex, ' for a male waiter, and ' for a waitress. There are only two exceptions to this rule: First, ' for "father", ' for "mother", and ' for "parent", and second, ' for "man", ' for "woman", and ' for "adult".


Sample

The Lord's Prayer:


Literature and publications

Ido has a number of publications that can be subscribed to or downloaded for free in most cases. is a magazine produced in France every few months with a range of topics. is a magazine produced by the Spanish Ido Society every two months that has a range of topics, as well as a few dozen pages of work translated from other languages. is the official organ for the language and has existed since the ibeginning of Idoism in 1908. Other sites can be found with various stories, fables or proverbs along with a few books of the Bible translated into Ido on a smaller scale. The site has a few podcasts in Ido along with various songs and other recorded material.
Wikipedia Wikipedia is a free content, free Online content, online encyclopedia that is written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki. Founded by Jimmy Wales and La ...
includes a
Ido-language edition
(known in Ido as ); in 2018 it was the 93rd most visited Wikipedia, and is second most viewed Wikipedia edition in artificial language (after Esperanto).


Symbols of Ido

The Ido star or Jankó star is the main symbol of Ido. It is a six pointed star, with the points representing Ido's six source languages: English, French, Italian, German, Spanish and Russian. Alternatively, the six points represent the six continents (excluding Antarctica). The emblem was originally a six pointed white star on a circular blue background, consisting of two concentric, equilateral triangles, with one vertically flipped. However, this was soon changed due to the similarity it presented with the
Star of David The Star of David (, , ) is a symbol generally recognized as representing both Jewish identity and Judaism. Its shape is that of a hexagram: the compound of two equilateral triangles. A derivation of the Seal of Solomon was used for decora ...
, since a true
international auxiliary language An international auxiliary language (sometimes acronymized as IAL or contracted as auxlang) is a language meant for communication between people from different nations, who do not share a common first language. An auxiliary language is primarily a ...
should not have religious affiliations. After a search to find an appropriate new symbol, the Ido-Akademio decided on the current Ido symbol, created by their secretary, Paul von Jankó (hence the alternative name the Jankó star). The current Ido Star is a concave isotoxal
hexagon In geometry, a hexagon (from Greek , , meaning "six", and , , meaning "corner, angle") is a six-sided polygon. The total of the internal angles of any simple (non-self-intersecting) hexagon is 720°. Regular hexagon A regular hexagon is de ...
, with a vertically flipped equilateral triangle overlaid on top.


International Ido conventions

ULI organises Ido conventions yearly, and the conventions include a mix of tourism and work. * 2024:
Madrid Madrid ( ; ) is the capital and List of largest cities in Spain, most populous municipality of Spain. It has almost 3.5 million inhabitants and a Madrid metropolitan area, metropolitan area population of approximately 7 million. It i ...
, Spain

* 2023:
Kassel Kassel (; in Germany, spelled Cassel until 1926) is a city on the Fulda River in North Hesse, northern Hesse, in Central Germany (geography), central Germany. It is the administrative seat of the Regierungsbezirk Kassel (region), Kassel and the d ...
, Germany

* 2022:
Dessau Dessau is a district of the independent city of Dessau-Roßlau in Saxony-Anhalt at the confluence of the rivers Mulde and Elbe, in the ''States of Germany, Bundesland'' (Federal State) of Saxony-Anhalt. Until 1 July 2007, it was an independent ...
, Germany, 15 participant

* 2019: Berlin, Germany, 15 participants from 2 countries
Information
* 2018:
Provins Provins () is a Communes of France, commune in the Seine-et-Marne Departments of France, department in the Île-de-France Regions of France, region in north-central France. Known for its well-preserved medieval architecture and importance througho ...
, France, 11 participants from 5 countries
Information
* 2017:
České Budějovice České Budějovice (; ) is a city in the South Bohemian Region of the Czech Republic. It has about 97,000 inhabitants. The city is located in the valley of the Vltava River, at its confluence with the Malše. České Budějovice is the largest ...
,
Czech Republic The Czech Republic, also known as Czechia, and historically known as Bohemia, is a landlocked country in Central Europe. The country is bordered by Austria to the south, Germany to the west, Poland to the northeast, and Slovakia to the south ...
, 8 participants from 5 countries
Information
* 2016:
Valencia Valencia ( , ), formally València (), is the capital of the Province of Valencia, province and Autonomous communities of Spain, autonomous community of Valencian Community, the same name in Spain. It is located on the banks of the Turia (r ...
, Spain, 10 participants from 7 countries
Information
* 2015: Berlin, Germany, 14 participants
Information
* 2014: Paris, France
Information
* 2013: Ouroux-en-Morvan, France, 13 participants from 4 countries
Information
* 2012:
Dessau Dessau is a district of the independent city of Dessau-Roßlau in Saxony-Anhalt at the confluence of the rivers Mulde and Elbe, in the ''States of Germany, Bundesland'' (Federal State) of Saxony-Anhalt. Until 1 July 2007, it was an independent ...
, Germany, 12 participants
Information
* 2011:
Echternach Echternach (, ; or locally ) is a commune with town status in the canton of Echternach, in eastern Luxembourg. Echternach lies near the border with Germany, and is the oldest town in Luxembourg. History The town grew around the Abbey of Echt ...
, Luxembourg
Information
, 24 participants from 11 countries * 2010:
Tübingen Tübingen (; ) is a traditional college town, university city in central Baden-Württemberg, Germany. It is situated south of the state capital, Stuttgart, and developed on both sides of the Neckar and Ammer (Neckar), Ammer rivers. about one in ...
, Germany
Information
* 2009:
Riga Riga ( ) is the capital, Primate city, primate, and List of cities and towns in Latvia, largest city of Latvia. Home to 591,882 inhabitants (as of 2025), the city accounts for a third of Latvia's total population. The population of Riga Planni ...
,
Latvia Latvia, officially the Republic of Latvia, is a country in the Baltic region of Northern Europe. It is one of the three Baltic states, along with Estonia to the north and Lithuania to the south. It borders Russia to the east and Belarus to t ...
, and
Tallinn Tallinn is the capital city, capital and List of cities in Estonia, most populous city of Estonia. Situated on a Tallinn Bay, bay in north Estonia, on the shore of the Gulf of Finland of the Baltic Sea, it has a population of (as of 2025) and ...
,
Estonia Estonia, officially the Republic of Estonia, is a country in Northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the Baltic Sea across from Sweden, to the south by Latvia, and to the east by Ru ...
, 14 participants from 7 countries
Information
* 2008:
Wuppertal Wuppertal (; ) is a city in North Rhine-Westphalia, in western Germany, with a population of 355,000. Wuppertal is the seventh-largest city in North Rhine-Westphalia and List of cities in Germany by population, 17th-largest in Germany. It ...
- Neviges, Germany, 18 participants from 5 countries
Information
* 2007: Paris, France, 14 participants from 9 countries
Information

Photos
* 2006: Berlin, Germany, approx. 25 participants from 10 countries
Information
* 2005:
Toulouse Toulouse (, ; ; ) is a city in southern France, the Prefectures in France, prefecture of the Haute-Garonne department and of the Occitania (administrative region), Occitania region. The city is on the banks of the Garonne, River Garonne, from ...
, France, 13 participants from 4 countries
Information
* 2004: Kyiv,
Ukraine Ukraine is a country in Eastern Europe. It is the List of European countries by area, second-largest country in Europe after Russia, which Russia–Ukraine border, borders it to the east and northeast. Ukraine also borders Belarus to the nor ...
, 17 participants from 9 countries
Information
* 2003: Großbothen, Germany, participants from 6 countries
Information
* 2002:
Kraków , officially the Royal Capital City of Kraków, is the List of cities and towns in Poland, second-largest and one of the oldest cities in Poland. Situated on the Vistula River in Lesser Poland Voivodeship, the city has a population of 804,237 ...
, Poland, 14 participants from 6 countries
Information
* 2001: Nuremberg, Germany, 14 participants from 5 countries

* 2000:
Nuremberg Nuremberg (, ; ; in the local East Franconian dialect: ''Nämberch'' ) is the Franconia#Towns and cities, largest city in Franconia, the List of cities in Bavaria by population, second-largest city in the States of Germany, German state of Bav ...
, Germany * 1999: Waldkappel, Germany * 1998: Białobrzegi, Poland, 15 participants from 6 countries * 1997: Bakkum, Netherlands, 19 participants from 7 countries * 1995: Elsnigk, Germany * 1991:
Ostend Ostend ( ; ; ; ) is a coastal city and municipality in the province of West Flanders in the Flemish Region of Belgium. It comprises the boroughs of Mariakerke, Raversijde, Stene and Zandvoorde, and the city of Ostend proper – the la ...
, Belgium, 21 participants * 1990: Waldkappel, Germany * 1989: Zürich- Thalwil, Switzerland * 1987:
Eschwege Eschwege (), the district seat of the Werra-Meißner-Kreis, is a town in northeastern Hesse, Germany. In 1971, the town hosted the eleventh ''Hessentag'' state festival. Geography Location The town lies on a broad plain tract of the river Wer ...
, Germany * 1985:
Antwerp Antwerp (; ; ) is a City status in Belgium, city and a Municipalities of Belgium, municipality in the Flemish Region of Belgium. It is the capital and largest city of Antwerp Province, and the third-largest city in Belgium by area at , after ...
, Belgium * 1983:
York York is a cathedral city in North Yorkshire, England, with Roman Britain, Roman origins, sited at the confluence of the rivers River Ouse, Yorkshire, Ouse and River Foss, Foss. It has many historic buildings and other structures, such as a Yor ...
, England * 1981: Jongny, Switzerland * 1980:
Namur Namur (; ; ) is a city and municipality in Wallonia, Belgium. It is the capital both of the province of Namur and of Wallonia, hosting the Parliament of Wallonia, the Government of Wallonia and its administration. Namur stands at the confl ...
, Belgium, 35 participants * 1979:
Uppsala Uppsala ( ; ; archaically spelled ''Upsala'') is the capital of Uppsala County and the List of urban areas in Sweden by population, fourth-largest city in Sweden, after Stockholm, Gothenburg, and Malmö. It had 177,074 inhabitants in 2019. Loc ...
, Sweden * 1978:
Cambridge Cambridge ( ) is a List of cities in the United Kingdom, city and non-metropolitan district in the county of Cambridgeshire, England. It is the county town of Cambridgeshire and is located on the River Cam, north of London. As of the 2021 Unit ...
, England * 1977: Berlin-Tegel, Germany * 1976:
Saint-Nazaire Saint-Nazaire (; ; ) is a Communes of France, commune in the Loire-Atlantique Departments of France, department in western France, in traditional Brittany. The town has a major harbour on the right bank of the Loire estuary, near the Atlantic Oc ...
, France * 1975: Thun, Switzerland * 1974:
Kyiv Kyiv, also Kiev, is the capital and most populous List of cities in Ukraine, city of Ukraine. Located in the north-central part of the country, it straddles both sides of the Dnieper, Dnieper River. As of 1 January 2022, its population was 2, ...
, Ukraine * 1973:
Cardiff Cardiff (; ) is the capital city, capital and List of urban areas in the United Kingdom, largest city of Wales. Cardiff had a population of in and forms a Principal areas of Wales, principal area officially known as the City and County of Ca ...
, Wales * 1972: Chaux-de-Fonds, Switzerland * 1971:
Trollhättan Trollhättan () is the 23rd-largest city in Sweden, the seat of Trollhättan Municipality, Västra Götaland County. It is situated by Göta älv, near the lake Vänern, and has a population of approximately 50,000 in the city proper. It is loc ...
,
Sweden Sweden, formally the Kingdom of Sweden, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, and Finland to the east. At , Sweden is the largest Nordic count ...
* 1970:
Luxembourg City Luxembourg (; ; ), also known as Luxembourg City ( or ; ; or ), is the capital city of Luxembourg and the Communes of Luxembourg, country's most populous commune. Standing at the confluence of the Alzette and Pétrusse rivers in southern Luxe ...
, Luxembourg * 1969: Zürich, Switzerland * 1968: Berlin, Germany * 1967:
Bourges Bourges ( ; ; ''Borges'' in Berrichon) is a commune in central France on the river Yèvre (Cher), Yèvre. It is the capital of the Departments of France, department of Cher (department), Cher, and also was the capital city of the former provin ...
, France * 1966:
Biella Biella (; ; ) is a city and (municipality) in the northern Italy, Italian region of Piedmont, the capital of the Province of Biella, province of the same name, with a population of 44,324 as of 31 December 2017. It is located about northeast of ...
, Italy * 1965: Lons-le-Saunier, France * 1964:
Kiel Kiel ( ; ) is the capital and most populous city in the northern Germany, German state of Schleswig-Holstein. With a population of around 250,000, it is Germany's largest city on the Baltic Sea. It is located on the Kieler Förde inlet of the Ba ...
, Germany * 1963:
Barcelona Barcelona ( ; ; ) is a city on the northeastern coast of Spain. It is the capital and largest city of the autonomous community of Catalonia, as well as the second-most populous municipality of Spain. With a population of 1.6 million within c ...
,
Spain Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Eur ...
* 1962:
Thun Thun () is a List of towns in Switzerland, town and a Municipalities of Switzerland, municipality in the administrative district of Thun (administrative district), Thun in the Cantons of Switzerland, canton of Canton of Bern, Bern in Switzerland. ...
, Switzerland * 1961: Zürich, Switzerland, participants * 1960: Colmar, France * 1959:
Freiburg im Breisgau Freiburg im Breisgau or simply Freiburg is the List of cities in Baden-Württemberg by population, fourth-largest city of the German state of Baden-Württemberg after Stuttgart, Mannheim and Karlsruhe. Its built-up area has a population of abou ...
, Germany * 1957:
Luxembourg City Luxembourg (; ; ), also known as Luxembourg City ( or ; ; or ), is the capital city of Luxembourg and the Communes of Luxembourg, country's most populous commune. Standing at the confluence of the Alzette and Pétrusse rivers in southern Luxe ...
, Luxembourg * 1952:
Berlin Berlin ( ; ) is the Capital of Germany, capital and largest city of Germany, by both area and List of cities in Germany by population, population. With 3.7 million inhabitants, it has the List of cities in the European Union by population withi ...
, Germany * 1951: Turin, Italy * 1950:
Colmar Colmar (; ; or ) is a city and commune in the Haut-Rhin department and Alsace region of north-eastern France. The third-largest commune in Alsace (after Strasbourg and Mulhouse), it is the seat of the prefecture of the Haut-Rhin department ...
, France * 1939: St. Gallen, Switzerland * 1937: Paris, France * 1936:
Szombathely } Szombathely (; ; also see #Etymology, names) is the 10th largest city in Hungary. It is the administrative centre of Vas County in the west of the country, located near the border with Austria. Szombathely lies by the streams ''Perint'' and '' ...
, Hungary * 1935:
Fredericia Fredericia () is a town located in Fredericia Municipality in the southeastern part of the Jutland peninsula in Denmark. The city is part of the Triangle Region Denmark, Triangle Region, which includes the neighbouring cities of Kolding and Vej ...
,
Denmark Denmark is a Nordic countries, Nordic country in Northern Europe. It is the metropole and most populous constituent of the Kingdom of Denmark,, . also known as the Danish Realm, a constitutionally unitary state that includes the Autonomous a ...
* 1934: Oostduinkerke, Belgium * 1933: Mondorf, Luxembourg * 1931: Lauenburg/Elbe, Germany * 1930:
Sopron Sopron (; , ) is a city in Hungary on the Austrian border, near Lake Neusiedl/Lake Fertő. History Ancient times-13th century In the Iron Age a hilltop settlement with a burial ground existed in the neighbourhood of Sopron-Várhely. When ...
,
Hungary Hungary is a landlocked country in Central Europe. Spanning much of the Pannonian Basin, Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia and ...
* 1929:
Freiburg im Breisgau Freiburg im Breisgau or simply Freiburg is the List of cities in Baden-Württemberg by population, fourth-largest city of the German state of Baden-Württemberg after Stuttgart, Mannheim and Karlsruhe. Its built-up area has a population of abou ...
, Germany * 1928:
Zürich Zurich (; ) is the list of cities in Switzerland, largest city in Switzerland and the capital of the canton of Zurich. It is in north-central Switzerland, at the northwestern tip of Lake Zurich. , the municipality had 448,664 inhabitants. The ...
,
Switzerland Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland ...
* 1927:
Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...
,
France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
* 1926:
Prague Prague ( ; ) is the capital and List of cities and towns in the Czech Republic, largest city of the Czech Republic and the historical capital of Bohemia. Prague, located on the Vltava River, has a population of about 1.4 million, while its P ...
,
Czechoslovakia Czechoslovakia ( ; Czech language, Czech and , ''Česko-Slovensko'') was a landlocked country in Central Europe, created in 1918, when it declared its independence from Austria-Hungary. In 1938, after the Munich Agreement, the Sudetenland beca ...
* 1925:
Turin Turin ( , ; ; , then ) is a city and an important business and cultural centre in northern Italy. It is the capital city of Piedmont and of the Metropolitan City of Turin, and was the first Italian capital from 1861 to 1865. The city is main ...
, Italy * 1924:
Luxembourg City Luxembourg (; ; ), also known as Luxembourg City ( or ; ; or ), is the capital city of Luxembourg and the Communes of Luxembourg, country's most populous commune. Standing at the confluence of the Alzette and Pétrusse rivers in southern Luxe ...
,
Luxembourg Luxembourg, officially the Grand Duchy of Luxembourg, is a landlocked country in Western Europe. It is bordered by Belgium to the west and north, Germany to the east, and France on the south. Its capital and most populous city, Luxembour ...
* 1923:
Kassel Kassel (; in Germany, spelled Cassel until 1926) is a city on the Fulda River in North Hesse, northern Hesse, in Central Germany (geography), central Germany. It is the administrative seat of the Regierungsbezirk Kassel (region), Kassel and the d ...
, Germany * 1922:
Dessau Dessau is a district of the independent city of Dessau-Roßlau in Saxony-Anhalt at the confluence of the rivers Mulde and Elbe, in the ''States of Germany, Bundesland'' (Federal State) of Saxony-Anhalt. Until 1 July 2007, it was an independent ...
,
Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
* 1921:
Vienna Vienna ( ; ; ) is the capital city, capital, List of largest cities in Austria, most populous city, and one of Federal states of Austria, nine federal states of Austria. It is Austria's primate city, with just over two million inhabitants. ...
,
Austria Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...


See also

* Comparison between Esperanto and Ido * Comparison between Ido and Novial * Comparison between Ido and Interlingua * Interhelpo * English false friends in Ido * Engelbert Pigal


References

Additional notes # L. Couturat, L. Leau. ''Delegation pour l'adoption d'une Langue auxiliare internationale'' (15–24 October 1907). Coulommiers: Imprimerie Paul Brodard, 1907


External links


The international language Ido

Union for the International Language Ido
(in Ido)
Ido : a Modern Language

The IDO foundation for language research in memory of Hellmut Röhnish





Ido for all – English course for learning Ido

Online Ido library
(in Ido)
Examples of Ido Phrases
{{Authority control Esperantido Constructed languages International auxiliary languages Constructed languages introduced in the 1900s International auxiliary languages introduced in the 1900s