@inproceedings{garcia-gilabert-etal-2025-terminology,
    title = "Terminology-Constrained Translation from Monolingual Data Using {GRPO}",
    author = "Garcia Gilabert, Javier  and
      Escolano, Carlos  and
      Liao, Xixian  and
      Melero, Maite",
    editor = "Haddow, Barry  and
      Kocmi, Tom  and
      Koehn, Philipp  and
      Monz, Christof",
    booktitle = "Proceedings of the Tenth Conference on Machine Translation",
    month = nov,
    year = "2025",
    address = "Suzhou, China",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest-emnlp/2025.wmt-1.111/",
    pages = "1335--1343",
    ISBN = "979-8-89176-341-8",
    abstract = "Terminology consistency is essential for high-quality machine translation, especially in domain-specific and professional contexts, where accurate term translation directly impacts usability. This paper presents the submission from the BSC team to the WMT25 Terminology-Aware Translation Task. We propose the use of GRPO (Group Relative Policy Optimization) to adapt translation models using monolingual data only, without requiring parallel corpora. Our reward function jointly optimizes for terminology adherence and overall translation quality, leveraging quality-estimation metrics. Experimental results demonstrate that our method consistently improves terminology translation across three language directions{---}English to Spanish, German, and Russian{---}by up to +0.36 Tₚ points across all evaluated models."
}