Cyberbullying detection in Roman Urdu language using lexicon based approach

Nowadays, online social networks (OSNs) have become integral part of our daily life and online users of social media are massively growing. The increasing use of OSNs by users leads to large amount of user communication data. This study focuses on OSNs users who communicate in Roman Urdu (Urdu language written in English alphabets). Pakistan alone has over 44 million OSNs users who communicate in Roman Urdu. In this paper, we addressed the issue of cyberbullying behavior on Twitter platform, where users use Roman Urdu as medium of their communication. To the best of our knowledge, this is the first study addressing cyberbullying behavior in Roman Urdu. To address this issue, we developed supervised machine learning method and proposed a lexicon-based model with set of features derived from Twitter. An evaluation model shows that the developed model attained results with area under receiver operating characteristics curve (AUC) of 0.986 and f-measure of 0.984. These results indicate that the proposed lexicon-based method gives feasible solution for detecting cyberbullying behavior in Roman Urdu in OSNs. Finally, we compared results achieved with our proposed lexicon-based method and the results obtained from other well-known models. The comparison results show the significance of our proposed model