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Reduction of Neural Machine Translation Failures by Incorporating Statistical Machine Translation

Author

Listed:
  • Jani Dugonik

    (Faculty of Electrical Engineering and Computer Science, University of Maribor, SI-2000 Maribor, Slovenia)

  • Mirjam Sepesy Maučec

    (Faculty of Electrical Engineering and Computer Science, University of Maribor, SI-2000 Maribor, Slovenia)

  • Domen Verber

    (Faculty of Electrical Engineering and Computer Science, University of Maribor, SI-2000 Maribor, Slovenia)

  • Janez Brest

    (Faculty of Electrical Engineering and Computer Science, University of Maribor, SI-2000 Maribor, Slovenia)

Abstract

This paper proposes a hybrid machine translation (HMT) system that improves the quality of neural machine translation (NMT) by incorporating statistical machine translation (SMT). Therefore, two NMT systems and two SMT systems were built for the Slovenian–English language pair, each for translation in one direction. We used a multilingual language model to embed the source sentence and translations into the same vector space. From each vector, we extracted features based on the distances and similarities calculated between the source sentence and the NMT translation, and between the source sentence and the SMT translation. To select the best possible translation, we used several well-known classifiers to predict which translation system generated a better translation of the source sentence. The proposed method of combining SMT and NMT in the hybrid system is novel. Our framework is language-independent and can be applied to other languages supported by the multilingual language model. Our experiment involved empirical applications. We compared the performance of the classifiers, and the results demonstrate that our proposed HMT system achieved notable improvements in the BLEU score, with an increase of 1.5 points and 10.9 points for both translation directions, respectively.

Suggested Citation

  • Jani Dugonik & Mirjam Sepesy Maučec & Domen Verber & Janez Brest, 2023. "Reduction of Neural Machine Translation Failures by Incorporating Statistical Machine Translation," Mathematics, MDPI, vol. 11(11), pages 1-22, May.
    • Handle: RePEc:gam:jmathe:v:11:y:2023:i:11:p:2484-:d:1157981
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    References listed on IDEAS

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