EusWN

Lexical knowledge base that structures word meanings around lexical-semantic relations.
It comprises 93,353 word senses and 59,948 words.
Online interface which directly accesses the Basque, Spanish, Catalan and English WordNets: http://ixa2.si.ehu.es/mcr/wei.html
The Basque WordNet follows the EuroWordNet framework and, basically, it is produced using a semi-automatic method that links Basque words to the English WordNet. We have found that in order to ensure proper linguistic quality and avoid excessive English bias, a double manual pass on the automatically produced Basque synsets is desirable: a first concept-to-concept pass to ensure correctness of the Basque words linked to the synsets, and a word-to-word pass to ensure the completeness of the word senses linked to the words. By this method, we expect to combine quick progress (as allowed by a development based on the English WordNet) with quality (as provided by a development based on a native dictionary).
We have completed the concept-to-concept review of the automatically produced links for the nominal concepts, and are currently performing the word-to-word review.