Since Edition 4.3, the EuroVoc thesaurus has been published and made available over the Internet in 23 official EU languages (Bulgarian, Croatian, Czech, Danish, Dutch, English, Estonian, Finnish, French, German, Greek, Hungarian, Italian, Latvian, Lithuanian, Maltese, Polish, Portuguese, Romanian, Slovak, Slovenian, Spanish and Swedish), and in another language (Serbian).
All language versions have the same status: each preferred term (descriptor) in one language necessarily matches a preferred term in each of the other languages. A thesaurus concept includes by default all the language equivalent of the preferred term.
However, equivalence between the non preferred terms (non descriptors) in the different languages does not necessarily exist. Each language is characterised by its wealth and its semantic and cultural differences, and a concept in one language is not always represented in another language.