EuroWordNet is a lexical-semantic database based on WordNet. There are wordnets for several languages, the original EuroWordNet project dealt with Dutch, Italian, Spanish, German, French, Czech, and Estonian. See https://www.illc.uva.nl/EuroWordNet for description of the corresponding European resources and development project.
The eurowordnets are structured the same way as the Princeton wordnet for English (see https://wordnet.princeton.edu/). The main unit is synset (set of synonymous words). Synsets are linked with semantic relations to each other, and with Inter-Lingual Index to the Princeton wordnet.
The EuroWordNet format is defined by the Database Editor Polaris (see https://www.illc.uva.nl/EuroWordNet/database.html). The Polaris tool enables to export and import wordnet files in a certain text format, the aim of this Eurown module is to parse and write these files, and to apply other operations on wordnets and synsets in them.