ML-SentiCon: Un lexicón multilingüe de polaridades semánticas a nivel de lemas

In this work, we present a set of lemma-level sentiment lexicons for English, Spanish, Catalan, Basque and Galician. These lexicons are layered, allowing to trade off between the amount of available words and the accuracy of the estimations. The lexicons have been automatically generated from an improved version of SentiWordNet, a very popular resource which contains estimations of the positivity and negativity of synsets. Our evaluations on the English and Spanish lexicons show high accuracies in all cases. The resource containing all the lexicons, ML-SentiCon, is publicly available.