Substituto – A Synchronous Educational Language Game for Simultaneous Teaching and Crowdsourcing Marianne Grace Araneta author Gülşen Eryiğit author Alexander König author Ji-Ung Lee author Ana Luís author Verena Lyding author Lionel Nicolas author Christos Rodosthenous author Federico Sangati author 2020-11 text Proceedings of the 9th Workshop on NLP for Computer Assisted Language Learning David Alfter editor Elena Volodina editor Ildikó Pilan editor Herbert Lange editor Lars Borin editor LiU Electronic Press Gothenburg, Sweden conference publication araneta-etal-2020-substituto https://aclanthology.org/2020.nlp4call-1.1/ 2020-11 1 9