Albanian
zëvendëskryeredaktori 
(21 letters) deputy editor-in-chief
Kundërzhurmëkrijuesabërësave 
(27 letters) against noisemakers
 
Bulgarian
 
neprotivokonstitutsionstvuvatelstvuvayte 
(40 letters) something against constitution
 
Catalan
 
anticonstitucionalment 
(22 letters) unconstitutionally
 
Croatian
 
prijestolonaslijednikovica 
(26 letters) the wife of a heir to the throne
 
Czech
 
nejneobhospodarovávatelnejšími 
(30 letters) the less farmed
 
Danish
 
Speciallægepraksisplanlægningsstabiliseringsperiode  
(52 letters) period where a specialist doctors planning of the practice is stabilized
Økonomiprofessorassistentsuddannelse  
(36 letters) an education to be an assistant for a professor in economics
 
Dutch
 
kindercarnavalsoptochtvoorbereidingswerkzaamheden 
(48 letters) preparation activities for a children’s carnival procession
         hottentottententententoonstelling
(33 letters) the exhibition of the tents of the Hottentot-tribe
Hottentottententententoonstellingsterrein
(33 letters) the terrain of the exhibition of the tents of the Hottentot-tribe
 
English
 
As for the English language, there are somewhat fanciful claims for extremely long words. However, more realistically here are the following in descending length:
pneumonoultramicroscopicsilicovolcanoconiosis 
(45 letters) the longest word in a major dictionary, a technical word for a lung disease created by silica dust inhalation
supercalifragilisticexpialidocious 
(34 letters) from the Mary Poppins film and musical with a fanciful defintion
hippopotomonstrosesquipedalianism 
(33 letters) which means the love of long words
pseudopseudohypoparathyroidism 
(30 letters) the longest non-coined word in a major dictionary for a specific inherited medical disorder
floccinaucinihilipilification 
(29 letters coined in 1741) meaning the categorizing of something that is useless or trivial (the longest unchallenged non-technical word)
antidisestablishmentarianism
(28 letters) the longest non-coined and non-technical word
          hippopotomonstrosesquipedaliophobia  
(35 letters) the fear of long words
 
Estonian
 
raudteeülesõidukoht 
(19 letters) train crossing point
 
Finnish
 
lentokonesuihkuturbiinimoottoriapumekaanikkoaliupseerioppilas
(61 letters) technical warrant officer trainee specialized in aircraft jet engines
epäjärjestelmällistyttämättömyydellänsäkäänköhän
(48 letters) even with his/her lack of being made non-systematic
peruspalveluliikelaitoskuntayhtymä
(34 letters) a municipality providing basic services
metroraideliityntäpysäköintiyhdistelmäajoneuvoparkkialue
(56 letters) combined vehicles parking area with access to metro rail
 
French
 
anticonstitutionnellement 
(25 letters) unconstitutionally
intergouvernementalisation 
(26 letters) intergovernmentalisation
 
German
 
Grundstücksverkehrsgenehmigungszuständigkeitsübertragungsverordnung 
(67 letters) a regulation about competences
Donaudampfschifffahrtsgesellschaft 
(34 letters) Danube steamship company
Geschwindigkeitsbegrenzung 
(26 letters) speed limit
 
Greek
 
υποδηματοεπιδιορθωτήριον  
(24 letters) by mending shoes
ωτορινολαρυγγολόγος
(19 letters) otolaryngologist (throat-ear-nose specialist)
ακτινοχρυσοφαιδροβροντολαμπροφεγγοφωτοστόλιστος
(47 letters) dressed in golden-shining, thundering and incandescent clothes
σκουληκομυρμηγκότρυπα
(21 letters) an anthill
φαλαινοκαρχαρίας 
(16 letters) whale shark
 
Hungarian
 
megszentségtelenithetetlenségeskedéseltekért 
(44 letters) “for your unprofaneable actions”
legmegvesztegethetetlenebbek 
(28 letters) the least corruptible ones
Korean
 
청자양인각연당초상감모란문은구대접
(18 syllable blocks) Celadon Sheep Engraving Lotus Portrait Inlaid Peony Door Silver Bowl Hospitality
legmegvesztegethetetlenebbek 
(28 letters) the least corruptible ones
 
Icelandic
 
vaðlaheiðarvegavinnuverkfærageymsluskúrslyklakippuhringurinn 
(60 letters) the key ring to the tool work shed in the road works of Vaðlaheiði
 
Italian
 
precipitevolissimevolmente 
(26 letters) to do something in a hurry
psiconeuroendocrinoimmunologia 
(30 letters) a discipline that deals with the relationship between the functioning of the nervous system, the immune system and the endocrine system
 
Latin
 
honorificabilitudinitatibus 
(27 letters) the state of being able to achieve honours (the longest word in Shakespeare from Love’s Labour’s Lost)
 
Latvian
 
pretpulksteņrādītājvirziens 
(28 letters) in a counter-clockwise direction
Virsapakšcepure 
(15 letters) underneath hat
Meningoencefalomieloradikuloneirīts
(35 letters) a medical term related to nerve inflammation
 
Lithuanian
 
nebeprisikiškiakopusteliaudavome 
(30 letters) we didn't pick rabbit cabbage
 
Polish
 
 
konstantynopolitańczykowianeczka
(32 letters) a girl living in Constantinople
 
Portuguese
 
anticonstitucionalissimamente 
(29 letters) unconstitutionally
 
Romanian
 
otorinolaringologie 
(19 letters) Otorhinolaringology
sternocleidomastoidian 
(22 letters) the sternocleidomastoid muscle that is located in the front of the neck
pneumoultramicroscopicosilicovulcaniconioza 
(49 letters) pneumonoultramicroscopicsilicovolcaniconiosis. lung disease caused by inhalation of volcanic silicon dust
 
Russian
 
тетрагидропиранилциклопентилтетрагидропиридопиридиновые 
(55 letters) Chemical substance
 
Serbian
 
prestolonaslednikovica 
(22 letters) wife of the Crown Prince
деведесетдеветогодишњакиња 
(26 letters) a ninety-nine-year-old woman
 
Slovenian
 
dialektičnomaterialističen 
(26 letters) dialectical materialistic
starocerkvenoslovanšcina 
(24 letters) Old Church Slavik Language
 
Slovak
 
najnevypočítavatelnejší
(23 letters) the most difficult example to calculate
najneobhospodárovatel'nejší
(26 letters) the less farmed 
najnerozkrasokorčuľovateľnejšia
(31 letters) a woman which is the least capable of doing figure skating  
 
Spanish
 
anticonstitucionalmente
(23 letters) unconstitutionally
(21 letters) person who favors or is part of the counter-revolution
          electroencefalografista
(23 letters)  electroencephalographists, specialists in the brain measurement technology of electroencephalography (EEG)
 
Swedish
nordvästersjökustartilleriflygspaningssimulatoranläggningsmaterielunderhåll – suppföljningssystemdiskussionsinläggsförberedelsearbeten
 
(131 letters) north west sea coastal artillery reconnaissance flight simulator facility equipment maintenance follow-up discussion posts preparatory work
 
Turkish
Afyonkarahisarlilardanlarmis 
 
 
(28 letters) They are said to belong to the family that came from Afyonkarahisar
Muvaffakiyetsizlestiricilestiriveremeyebileceklerimizdenmissinizcesine
(70 letters) As if you would be from those we can not easily/quickly make a maker of unsuccessful ones
çekostravakyalılardanmısınızsiz?
(31 letters) Are you from çekostravakyalı?
 
Ukranian
 
рентгеноелектрокардіографічного
(31 letters) x-ray electrocardiographic
 
Welsh
 
Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch
(58 letters) village on the island of Anglesey in Wales, literal meaning: St Mary's in Hollow of the White Hazel near to the Rapid Whirlpool of Llantysilio of the Red Cave
 
TAMIL
 
திருவாலவாயுடையார்திருவிலையாடற்புராணம்
(31 characters) a Hindu religious text
 
 
The concept and examples featured on this page have been provided by Adam Jacot de Boinod