Towards Continual Learning for Multilingual Machine Translation via Vocabulary Substitution Xavier Garcia author Noah Constant author Ankur Parikh author Orhan Firat author 2021-06 text Proceedings of the 2021 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies Kristina Toutanova editor Anna Rumshisky editor Luke Zettlemoyer editor Dilek Hakkani-Tur editor Iz Beltagy editor Steven Bethard editor Ryan Cotterell editor Tanmoy Chakraborty editor Yichao Zhou editor Association for Computational Linguistics Online conference publication garcia-etal-2021-towards 10.18653/v1/2021.naacl-main.93 https://aclanthology.org/2021.naacl-main.93/ 2021-06 1184 1192