Multilingual Neural Machine Translation with Language Clustering Xu Tan author Jiale Chen author Di He author Yingce Xia author Tao Qin author Tie-Yan Liu author 2019-11 text Proceedings of the 2019 Conference on Empirical Methods in Natural Language Processing and the 9th International Joint Conference on Natural Language Processing (EMNLP-IJCNLP) Kentaro Inui editor Jing Jiang editor Vincent Ng editor Xiaojun Wan editor Association for Computational Linguistics Hong Kong, China conference publication tan-etal-2019-multilingual 10.18653/v1/D19-1089 https://aclanthology.org/D19-1089/ 2019-11 963 973