# Volapük
**Volapük** is a constructed international auxiliary language created by the German Catholic priest [Johann Martin Schleyer](https://www.edgepedia.org/johann-martin-schleyer) (1832-1912) and first published in 1879, built mainly on English roots reshaped for easy pronunciation and on a regular, heavily agglutinating grammar. It was the first international planned language to achieve noticeable success, spreading across Europe and beyond in the 1880s before collapsing in the face of [Esperanto](https://www.edgepedia.org/esperanto), and it survives today in a lightly revised form with a small speaker community.
| Key fact | Detail |
|---|---|
| Creator and date | Johann Martin Schleyer, a German Catholic priest; grammar printed in 1879 in the journal *Sionsharfe*, with a grammar and word list as an independent book by spring 1880[1](https://pmc.ncbi.nlm.nih.gov/articles/PMC11934946/) |
| Name | From *vol* (based on English *world*) plus *pük* (from *speak*), genitive *vola* plus *pük*, "language of the world"[2](https://esfconnected.org/2023/02/06/conlang-excursions-7/) • [3](https://literatureatlas.com/founding-book/volapuk-grammar/) |
| Noun system | Four cases marked by final vowel, nominative unmarked, accusative -i, dative -e, genitive -a; plural -s after the case vowel[2](https://esfconnected.org/2023/02/06/conlang-excursions-7/) |
| Phonology | Roots typically consonant-vowel-consonant; r replaced by l; root-final consonants never sibilants; stress always on the final syllable; alphabet lacks q and w and adds umlauted ä, ö, ü as independent letters[2](https://esfconnected.org/2023/02/06/conlang-excursions-7/) |
| Peak, 1889 | Textbooks in 25 languages, over a thousand accredited teachers, world assemblies from 1884, and, around 1890, hundreds of thousands of adherents[2](https://esfconnected.org/2023/02/06/conlang-excursions-7/) • [4](https://www.dbnl.org/tekst/_taa014199801_01/_taa014199801_01_0046.php) |
| Decline | By 1894 only fifty clubs were active, and by 1910 the language was practically dead, with many speakers joining Esperanto[1](https://pmc.ncbi.nlm.nih.gov/articles/PMC11934946/) |
| Modern form | Arie de Jong's revision, proposed in 1929 and published as *Gramat Volapüka* in 1931, is the basis of today's Volapük nulik, with roughly twenty speakers[5](https://www.europalingua.eu/ideopedia/index.php?title=Volap%C3%BCk) • [2](https://esfconnected.org/2023/02/06/conlang-excursions-7/) |
## Creation and purpose
Schleyer devised the language on a sleepless night in 1879, attributing the idea to divine inspiration, and published the following year[2](https://esfconnected.org/2023/02/06/conlang-excursions-7/). He drew the roots mainly from English, which he considered the easiest and most widely known language of educated peoples despite its orthography, and to a lesser extent from other West European languages[1](https://pmc.ncbi.nlm.nih.gov/articles/PMC11934946/). Like many late nineteenth-century planners, he saw a common language as a path to human unity and universal peace[6](https://www.sejongjul.org/download/download_pdf?pid=jul-1-1-20). For Schleyer himself, Volapük was meant mostly to replace Latin as an international language for subtle intellectual discussion and poetry[7](https://www.cambridge.org/core/journals/international-review-of-social-history/article/roberto-garvia-esperanto-and-its-rivals-the-struggle-for-an-international-language-haney-foundation-series-university-of-pennsylvania-press-philadelphia-pa-2015-viii-226-pp-5500-3600/7F9D98282B0D6AD9B237127560EDAA90).
## Vocabulary and sound structure
The vocabulary shows how far Schleyer was willing to deform his English sources. The r was eliminated, being replaced by l, so that *world* became *vol* and *speak* became *pük*; every word follows a consonant-vowel-consonant pattern, and doubled consonants are reduced to one. The genitive is formed with -a, giving *vol-a-pük*, "language of the world"[4](https://www.dbnl.org/tekst/_taa014199801_01/_taa014199801_01_0046.php). Because no root may end in s or another sibilant, which would collide with the plural -s, the English *rose* surfaces as *lol*, one l replacing the r and the second preventing a final s[2](https://esfconnected.org/2023/02/06/conlang-excursions-7/). A Dutch observer of the language summed up the resulting trade-off: each change was individually well motivated, but the end result strays so far from English that knowing English gives no advantage in understanding Volapük, so Schleyer might as well have invented the word forms himself[4](https://www.dbnl.org/tekst/_taa014199801_01/_taa014199801_01_0046.php). Modern analyses describe the same strategy as deliberate obfuscation of the source words to avoid favoring speakers of any particular language[8](https://journals.rudn.ru/semiotics-semantics/article/view/31528/en_US).
The alphabet uses the Latin letters without q and w, adding the umlauted vowels ä, ö and ü, pronounced as in German. Schleyer proposed special letter shapes for them, which never caught on, though they later entered the Unicode standard; in dictionaries the umlauted vowels sort as independent letters after their plain counterparts[2](https://esfconnected.org/2023/02/06/conlang-excursions-7/).
## Grammar
Volapük's grammar is regular but heavy. Nouns decline through four cases marked by a final vowel, with the plural -s following the case vowel, so *pük* "language" gives *püki* "language" (accusative), *püke* "to the language" (dative), and *pükis* "languages" (nominative plural)[2](https://esfconnected.org/2023/02/06/conlang-excursions-7/). The verb system carries elaborate tense and mood endings, and a stress rule places the accent on the final syllable of every word, even when that syllable is only a grammatical ending[2](https://esfconnected.org/2023/02/06/conlang-excursions-7/). One count puts the tense and mood system at 234 paradigm forms per verb[8](https://journals.rudn.ru/semiotics-semantics/article/view/31528/en_US). Schleyer considered the language easy to learn, but many critics judged its grammar complicated (though regular), its pronunciation difficult, and its word formation convoluted[6](https://www.sejongjul.org/download/download_pdf?pid=jul-1-1-20). The rigid phonotactic template also makes long compounds hard to parse, since roots and affixes share the same shape and boundaries between them are hard to see[9](https://conlang.stackexchange.com/questions/755/why-are-compound-words-in-volapuk-hard-to-parse-while-compound-words-in-esperant).
## Rise and collapse, 1879-1910
After initial neglect by the scientific and literary world, Volapük spread first to Austria, where a propagation society formed in Vienna in 1882; from 1884 it expanded rapidly in Holland and Belgium[2](https://esfconnected.org/2023/02/06/conlang-excursions-7/). Enough speakers existed by 1884 to hold a world congress, the Lasam Valemik, in Friedrichshafen near Schleyer's home. A second assembly in Munich in 1887, about a month after the first Esperanto textbook appeared, founded the Volapükaklub Valemik and the International Volapük Academy (Kadem Bevünetik Volapüka), charged with maintaining the dictionary and grammar[2](https://esfconnected.org/2023/02/06/conlang-excursions-7/).
1889 marked the peak: textbooks in no fewer than 25 languages, over a thousand accredited teachers, and a third General Assembly in Paris conducted, by one account, entirely in Volapük[2](https://esfconnected.org/2023/02/06/conlang-excursions-7/). Around 1890 the movement counted hundreds of thousands of adherents, with large congresses and books and magazines appearing worldwide[4](https://www.dbnl.org/tekst/_taa014199801_01/_taa014199801_01_0046.php).
The collapse was as fast as the rise. Schleyer claimed Volapük as his intellectual property and refused compromise, envisioning a movement structured on the model of the Roman Catholic Church with himself as pope; his rigidity, combined with disagreement among followers over the language's goal and preferred grammar, weakened the movement considerably[7](https://www.cambridge.org/core/journals/international-review-of-social-history/article/roberto-garvia-esperanto-and-its-rivals-the-struggle-for-an-international-language-haney-foundation-series-university-of-pennsylvania-press-philadelphia-pa-2015-viii-226-pp-5500-3600/7F9D98282B0D6AD9B237127560EDAA90). He clashed especially with the Academy's president, [Auguste Kerckhoffs](https://www.edgepedia.org/auguste-kerckhoffs), who wanted Volapük simplified for international trade and found Schleyer's elaborate case and tense endings impractical[7](https://www.cambridge.org/core/journals/international-review-of-social-history/article/roberto-garvia-esperanto-and-its-rivals-the-struggle-for-an-international-language-haney-foundation-series-university-of-pennsylvania-press-philadelphia-pa-2015-viii-226-pp-5500-3600/7F9D98282B0D6AD9B237127560EDAA90). As the Dutch account puts it, the rage for Volapük died as quickly as it had arisen, and Esperanto, published in 1887 with a simpler grammar and an author who renounced ownership of it, took over the constituency[4](https://www.dbnl.org/tekst/_taa014199801_01/_taa014199801_01_0046.php) • [3](https://literatureatlas.com/founding-book/volapuk-grammar/). Much of Esperanto's early infrastructure consisted of journals and associations converted from Volapük after disappointment with the movement's fights and the language's difficulties[10](https://www.cambridge.org/core/services/aop-cambridge-core/content/view/7F9D98282B0D6AD9B237127560EDAA90/S0020859018000081a.pdf/roberto-garvia-esperanto-and-its-rivals-the-struggle-for-an-international-language-haney-foundation-series-university-of-pennsylvania-press-philadelphia-pa-2015-viii-226-pp-dollar5500-pound3600.pdf). By 1894 only fifty clubs remained active, and by 1910 the language was practically dead[1](https://pmc.ncbi.nlm.nih.gov/articles/PMC11934946/).
## Revival and the modern language
Volapük did not entirely disappear. It enjoyed a modest revival in the Netherlands in the 1920s and 1930s and in Germany until the Nazis suppressed it. The Dutch physician Arie de Jong revised the language with the movement's consent, producing a grammar, *Gramat Volapüka*, published by Brill in 1931 together with a Volapük-German dictionary; this modern Volapük (Volapük nulik) is what is spoken today[5](https://www.europalingua.eu/ideopedia/index.php?title=Volap%C3%BCk). De Jong had already proposed a reformed version in 1929, the language's fiftieth year, revising the grammar and reviving the movement in the Netherlands until the Nazi suppression[2](https://esfconnected.org/2023/02/06/conlang-excursions-7/). Because the revision was made with the movement's legal head, Albert Sleumer, and accepted by the movement as a whole, its adherents regard Volapük nulik as a legitimate evolution rather than a split[5](https://www.europalingua.eu/ideopedia/index.php?title=Volap%C3%BCk). The modern language keeps a lexicon of about 3,000 roots and is regulated by the Kadem Volapüka, with roughly twenty speakers[5](https://www.europalingua.eu/ideopedia/index.php?title=Volap%C3%BCk). Its code in the [ISO 639](https://www.edgepedia.org/iso-639) standards is vo (639-1) and vol (639-2 and 639-3)[5](https://www.europalingua.eu/ideopedia/index.php?title=Volap%C3%BCk).
## Comparing Volapük with Esperanto
A 2024 complexity study using Johanna Nichols' metric scored Volapük at 10, the top of the moderate-complexity band, while Esperanto scored 5, at the upper edge of low complexity; every other auxiliary language in the sample scored between 2 and 4. The authors also noted a pattern across the sample: the oldest auxiliary language, Volapük, is the most complex, even by natural-language standards, and later inventions grew steadily simpler[11](https://www.researchgate.net/publication/383479098_From_Esperanto_to_Volapuk_A_Graph-Based_Approach_to_Assessing_the_Complexity_of_Constructed_Languages). The Dutch comparison draws the same distinction at the level of design philosophy: Volapük has a simple vocabulary but an unusually difficult grammar for speakers of languages without cases and complex passives, while Esperanto keeps more recognizable Romance-based roots and a larger variety of sounds and words, with more prepositions and fewer case endings[4](https://www.dbnl.org/tekst/_taa014199801_01/_taa014199801_01_0046.php). The divergent fates of the two languages have also been attributed to their founders' conduct: Schleyer "didn't want anyone else to make decisions about it," while Zamenhof published his language and let speakers do with it what they would[12](https://time.com/4417809/esperanto-history-invention/).
## References
1. [The Volapük Qur'an: language, scripture, and nineteenth-century German universalist provincialism, Language & History (2025)](https://pmc.ncbi.nlm.nih.gov/articles/PMC11934946/)
2. [Simon Davies (2023). Conlang Excursions 7: Esperanto in a parallel universe, Esperantic Studies Foundation](https://esfconnected.org/2023/02/06/conlang-excursions-7/)
3. [Volapük and the academy that abandoned it, Literature Atlas](https://literatureatlas.com/founding-book/volapuk-grammar/)
4. [Rolandt Tweehuysen (1998). Hulptalen: goed bedoeld maar onhaalbaar, Onze Taal, DBNL](https://www.dbnl.org/tekst/_taa014199801_01/_taa014199801_01_0046.php)
5. [Volapük, Ideopedia (Europalingua)](https://www.europalingua.eu/ideopedia/index.php?title=Volap%C3%BCk)
6. [Andrew Large. The Prospects for an International Language, Journal of Universal Language (1996)](https://www.sejongjul.org/download/download_pdf?pid=jul-1-1-20)
7. [Review of Roberto Garvía, Esperanto and Its Rivals, International Review of Social History](https://www.cambridge.org/core/journals/international-review-of-social-history/article/roberto-garvia-esperanto-and-its-rivals-the-struggle-for-an-international-language-haney-foundation-series-university-of-pennsylvania-press-philadelphia-pa-2015-viii-226-pp-5500-3600/7F9D98282B0D6AD9B237127560EDAA90)
8. [P. N. Novikov (2022). Constructed Languages as Semantic and Semiotic Systems, RUDN Journal of Language Studies, Semiotics and Semantics](https://journals.rudn.ru/semiotics-semantics/article/view/31528/en_US)
9. [Why are compound words in Volapük hard to parse while compound words in Esperanto are not? Constructed Languages Stack Exchange](https://conlang.stackexchange.com/questions/755/why-are-compound-words-in-volapuk-hard-to-parse-while-compound-words-in-esperant)
10. [Review of Garvía, Esperanto and Its Rivals (PDF), International Review of Social History](https://www.cambridge.org/core/services/aop-cambridge-core/content/view/7F9D98282B0D6AD9B237127560EDAA90/S0020859018000081a.pdf/roberto-garvia-esperanto-and-its-rivals-the-struggle-for-an-international-language-haney-foundation-series-university-of-pennsylvania-press-philadelphia-pa-2015-viii-226-pp-dollar5500-pound3600.pdf)
11. [Irina Sokolova and Ilya Makarov (2024). From Esperanto to Volapük: Interpretable Graph Features for Assessing Linguistic Complexity in Constructed Languages, IEEE Access 12](https://www.researchgate.net/publication/383479098_From_Esperanto_to_Volapuk_A_Graph-Based_Approach_to_Assessing_the_Complexity_of_Constructed_Languages)
12. [Olivia B. Waxman (2016). The Serious History Behind Esperanto, TIME](https://time.com/4417809/esperanto-history-invention/)
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*Topic: Encyclopedia › Society and history › Languages and linguistics › Languages and dialects › Named languages by region › Named languages overview*
*Initially written Sep 17, 2026 · Reviewed: Oct 25, 2026 · Edited: Oct 15, 2026; Oct 25, 2026 · Last review: Oct 25, 2026*
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