Govardhan Padmanabhan
2025
Submission for WMT25 Task 3
Govardhan Padmanabhan
Proceedings of the Tenth Conference on Machine Translation
Govardhan Padmanabhan
Proceedings of the Tenth Conference on Machine Translation
The paper presents two approaches submitted to the WMT 2025 Automated Translation Quality Evaluation Systems Task 3 - Quality Estimation (QE)-informed Segment-level Error Correction. While jointly training QE systems with Automatic Post-Editing (APE) has shown improved performance for both tasks, APE systems are still known to overcorrect the output of Machine Translation (MT), leading to a degradation in performance. We investigate a simple training-free approach - QE-informed Retranslation, and compare it with another within the same training-free paradigm. Our winning approach selects the highest-quality translation from multiple candidates generated by different LLMs. The second approach, more akin to APE, instructs an LLM to replace error substrings as specified in the provided QE explanation(s). A conditional heuristic was employed to minimise the number of edits, with the aim of maximising the Gain-to-Edit ratio. The two proposed approaches achieved a ∆COMET scoreof 0.0201 and −0.0108, respectively, leading the first approach to achieve the winning position on the subtask leaderboard.