When Does Reasoning Help in Machine Translation? A Hierarchical Analysis of LRM Reasoning Traces
Large Reasoning Models increasingly use intermediate traces for machine translation, but it remains unclear when such reasoning helps or hurts. We analyze reasoning traces across models, languages, domains, and datasets, focusing on reasoning language, length, and structure. We find that the best reasoning language is...
Yu-Xiang Liu, Jiaming Luo, Eleftheria Briakou et al.
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