A Call for More Rigor in Unsupervised Cross-lingual Learning Mikel Artetxe author Sebastian Ruder author Dani Yogatama author Gorka Labaka author Eneko Agirre author 2020-07 text Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics Dan Jurafsky editor Joyce Chai editor Natalie Schluter editor Joel Tetreault editor Association for Computational Linguistics Online conference publication artetxe-etal-2020-call 10.18653/v1/2020.acl-main.658 https://aclanthology.org/2020.acl-main.658/ 2020-07 7375 7388