Findings of the WMT 2021 Shared Task on Quality Estimation Lucia Specia author Frédéric Blain author Marina Fomicheva author Chrysoula Zerva author Zhenhao Li author Vishrav Chaudhary author André F T Martins author 2021-11 text Proceedings of the Sixth Conference on Machine Translation Loic Barrault editor Ondrej Bojar editor Fethi Bougares editor Rajen Chatterjee editor Marta R Costa-jussa editor Christian Federmann editor Mark Fishel editor Alexander Fraser editor Markus Freitag editor Yvette Graham editor Roman Grundkiewicz editor Paco Guzman editor Barry Haddow editor Matthias Huck editor Antonio Jimeno Yepes editor Philipp Koehn editor Tom Kocmi editor Andre Martins editor Makoto Morishita editor Christof Monz editor Association for Computational Linguistics Online conference publication specia-etal-2021-findings https://aclanthology.org/2021.wmt-1.71/ 2021-11 684 725