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iSOL is a list of domain independent opinion signal words in Spanish.

For the elaboration of the resource it has begun from the list of words that the professors Bing Liu maintains (Bing Liu’s Opinion Lexicon). The word list has been automatically translated using the Reverso translator and subsequently corrected manually.

The list consists of 2,509 positive and 5,626 negative words. For more information on how the list was developed see the paper: Semantic Orientation for Polarity Classification in Spanish Reviews.


If you use iSOL, please, cite the following paper:

Molina-González, M. D., Martínez-Cámara, E., Martín-Valdivia, M. T., & Perea-Ortega, J. M. (2013). Semantic orientation for polarity classification in Spanish reviews. Expert Systems with Applications, 40(18), 7250-7257.

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