Several research work have been reported since 2010 in this research field of hate speech detection (Kwok and Wang, 2013; Burnap and Williams, 2015; Djuric et al., 2015; <cite>Davidson et al., 2017</cite>; Malmasi and Zampieri, 2018; Schmidt and Wiegand, 2017; Fortuna and Nunes, 2018; ElSherief et al., 2018; Gambäck and Sikdar, 2017; Zhang et al., 2018; Mathur et al., 2018) .