Findings of the WMT26 Chinese–Southeast Asian Multilingual MT Shared Task

Tianyu Dong, Ziyan Chen, Jingsong Liu, Shaolin Zhu


Abstract
We present the findings of the WMT26 Chinese–Southeast Asian Multilingual Machine Translation shared task. The task evaluates fourteen translation directions between Chinese and Thai, Vietnamese, Lao, Burmese, Khmer, Indonesian, and Malay. Organizers released manually aligned parallel data, domain-matched monolingual data, validation data, and a blind test set. The published leaderboard contains eleven systems and combines translation quality, measured by the equal-weight average of sacreBLEU and COMET, with a throughput bonus measured on a shared four-GPU platform. Jiutian-MT ranks first overall, while AiBabelMT achieves the highest throughput. We describe the task design, data resources, evaluation protocol, and published aggregate results, then examine how quality and throughput shape the final ranking. The results also motivate more detailed reporting by language direction and domain
Anthology ID:
2026.wmt-main.55
Volume:
Proceedings of the Eleventh Conference on Machine Translation
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Barry Haddow, Tom Kocmi, Philipp Koehn, Christof Monz
Venues:
WMT | WS
SIG:
SIGMT
Publisher:
Association for Computational Linguistics
Note:
Pages:
1131–1137
Language:
URL:
https://aclanthology.org/2026.wmt-main.55/
DOI:
Bibkey:
Cite (ACL):
Tianyu Dong, Ziyan Chen, Jingsong Liu, and Shaolin Zhu. 2026. Findings of the WMT26 Chinese–Southeast Asian Multilingual MT Shared Task. In Proceedings of the Eleventh Conference on Machine Translation, pages 1131–1137, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
Findings of the WMT26 Chinese–Southeast Asian Multilingual MT Shared Task (Dong et al., WMT 2026)
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PDF:
https://aclanthology.org/2026.wmt-main.55.pdf