Sentiment analysis systems, including the best performing ones such as the NRC-Canada system Kiritchenko et al., 2014a;Zhu et al., 2014), use sentiment lexicons to obtain significant improvements (Wilson et al., 2013;Pontiki et al., 2014;Rosenthal et al., 2015;Mohammad et al., 2016a).
much of the past work has focused on English texts and English sentiment lexicons.