Measuring language distance among historical varieties using perplexity. Application to European Portuguese. Jose Ramom Pichel Campos author Pablo Gamallo author Iñaki Alegria author 2018-08 text Proceedings of the Fifth Workshop on NLP for Similar Languages, Varieties and Dialects (VarDial 2018) Marcos Zampieri editor Preslav Nakov editor Nikola Ljubešić editor Jörg Tiedemann editor Shervin Malmasi editor Ahmed Ali editor Association for Computational Linguistics Santa Fe, New Mexico, USA conference publication pichel-campos-etal-2018-measuring https://aclanthology.org/W18-3916/ 2018-08 145 155