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    <abstract>Omission and addition of content is a typical issue in neural machine translation. We propose a method for detecting such phenomena with off-the-shelf translation models. Using contrastive conditioning, we compare the likelihood of a full sequence under a translation model to the likelihood of its parts, given the corresponding source or target sequence. This allows to pinpoint superfluous words in the translation and untranslated words in the source even in the absence of a reference translation. The accuracy of our method is comparable to a supervised method that requires a custom quality estimation model.</abstract>
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%0 Conference Proceedings
%T As Little as Possible, as Much as Necessary: Detecting Over- and Undertranslations with Contrastive Conditioning
%A Vamvas, Jannis
%A Sennrich, Rico
%S Proceedings of the 60th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers)
%D 2022
%8 May
%I Association for Computational Linguistics
%C Dublin, Ireland
%F vamvas-sennrich-2022-little
%X Omission and addition of content is a typical issue in neural machine translation. We propose a method for detecting such phenomena with off-the-shelf translation models. Using contrastive conditioning, we compare the likelihood of a full sequence under a translation model to the likelihood of its parts, given the corresponding source or target sequence. This allows to pinpoint superfluous words in the translation and untranslated words in the source even in the absence of a reference translation. The accuracy of our method is comparable to a supervised method that requires a custom quality estimation model.
%R 10.18653/v1/2022.acl-short.53
%U https://aclanthology.org/2022.acl-short.53
%U https://doi.org/10.18653/v1/2022.acl-short.53
%P 490-500

Markdown (Informal)

[As Little as Possible, as Much as Necessary: Detecting Over- and Undertranslations with Contrastive Conditioning](https://aclanthology.org/2022.acl-short.53) (Vamvas & Sennrich, ACL 2022)

• As Little as Possible, as Much as Necessary: Detecting Over- and Undertranslations with Contrastive Conditioning (Vamvas & Sennrich, ACL 2022)

ACL

• Jannis Vamvas and Rico Sennrich. 2022. As Little as Possible, as Much as Necessary: Detecting Over- and Undertranslations with Contrastive Conditioning. In Proceedings of the 60th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers), pages 490–500, Dublin, Ireland. Association for Computational Linguistics.