The LMU Munich Systems for the WMT21 Unsupervised and Very Low-Resource Translation Task

Jindřich Libovický; Alexander Fraser

The LMU Munich Systems for the WMT21 Unsupervised and Very Low-Resource Translation Task

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Abstract

We present our submissions to the WMT21 shared task in Unsupervised and Very Low Resource machine translation between German and Upper Sorbian, German and Lower Sorbian, and Russian and Chuvash. Our low-resource systems (German↔Upper Sorbian, Russian↔Chuvash) are pre-trained on high-resource pairs of related languages. We fine-tune those systems using the available authentic parallel data and improve by iterated back-translation. The unsupervised German↔Lower Sorbian system is initialized by the best Upper Sorbian system and improved by iterated back-translation using monolingual data only.

Anthology ID:: 2021.wmt-1.105
Volume:: Proceedings of the Sixth Conference on Machine Translation
Month:: November
Year:: 2021
Address:: Online
Editors:: Loic Barrault, Ondrej Bojar, Fethi Bougares, Rajen Chatterjee, Marta R. Costa-jussa, Christian Federmann, Mark Fishel, Alexander Fraser, Markus Freitag, Yvette Graham, Roman Grundkiewicz, Paco Guzman, Barry Haddow, Matthias Huck, Antonio Jimeno Yepes, Philipp Koehn, Tom Kocmi, Andre Martins, Makoto Morishita, Christof Monz
Venue:: WMT
SIG:: SIGMT
Publisher:: Association for Computational Linguistics
Note:
Pages:: 989–994
Language:
URL:: https://aclanthology.org/2021.wmt-1.105/
DOI:
Bibkey:
Cite (ACL):: Jindřich Libovický and Alexander Fraser. 2021. The LMU Munich Systems for the WMT21 Unsupervised and Very Low-Resource Translation Task. In Proceedings of the Sixth Conference on Machine Translation, pages 989–994, Online. Association for Computational Linguistics.
Cite (Informal):: The LMU Munich Systems for the WMT21 Unsupervised and Very Low-Resource Translation Task (Libovický & Fraser, WMT 2021)
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PDF:: https://aclanthology.org/2021.wmt-1.105.pdf

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@inproceedings{libovicky-fraser-2021-lmu,
    title = "The {LMU} {M}unich Systems for the {WMT}21 Unsupervised and Very Low-Resource Translation Task",
    author = "Libovick{\'y}, Jind{\v{r}}ich  and
      Fraser, Alexander",
    editor = "Barrault, Loic  and
      Bojar, Ondrej  and
      Bougares, Fethi  and
      Chatterjee, Rajen  and
      Costa-jussa, Marta R.  and
      Federmann, Christian  and
      Fishel, Mark  and
      Fraser, Alexander  and
      Freitag, Markus  and
      Graham, Yvette  and
      Grundkiewicz, Roman  and
      Guzman, Paco  and
      Haddow, Barry  and
      Huck, Matthias  and
      Yepes, Antonio Jimeno  and
      Koehn, Philipp  and
      Kocmi, Tom  and
      Martins, Andre  and
      Morishita, Makoto  and
      Monz, Christof",
    booktitle = "Proceedings of the Sixth Conference on Machine Translation",
    month = nov,
    year = "2021",
    address = "Online",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2021.wmt-1.105/",
    pages = "989--994",
    abstract = "We present our submissions to the WMT21 shared task in Unsupervised and Very Low Resource machine translation between German and Upper Sorbian, German and Lower Sorbian, and Russian and Chuvash. Our low-resource systems (German{\ensuremath{\leftrightarrow}}Upper Sorbian, Russian{\ensuremath{\leftrightarrow}}Chuvash) are pre-trained on high-resource pairs of related languages. We fine-tune those systems using the available authentic parallel data and improve by iterated back-translation. The unsupervised German{\ensuremath{\leftrightarrow}}Lower Sorbian system is initialized by the best Upper Sorbian system and improved by iterated back-translation using monolingual data only."
}

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%0 Conference Proceedings
%T The LMU Munich Systems for the WMT21 Unsupervised and Very Low-Resource Translation Task
%A Libovický, Jindřich
%A Fraser, Alexander
%Y Barrault, Loic
%Y Bojar, Ondrej
%Y Bougares, Fethi
%Y Chatterjee, Rajen
%Y Costa-jussa, Marta R.
%Y Federmann, Christian
%Y Fishel, Mark
%Y Fraser, Alexander
%Y Freitag, Markus
%Y Graham, Yvette
%Y Grundkiewicz, Roman
%Y Guzman, Paco
%Y Haddow, Barry
%Y Huck, Matthias
%Y Yepes, Antonio Jimeno
%Y Koehn, Philipp
%Y Kocmi, Tom
%Y Martins, Andre
%Y Morishita, Makoto
%Y Monz, Christof
%S Proceedings of the Sixth Conference on Machine Translation
%D 2021
%8 November
%I Association for Computational Linguistics
%C Online
%F libovicky-fraser-2021-lmu
%X We present our submissions to the WMT21 shared task in Unsupervised and Very Low Resource machine translation between German and Upper Sorbian, German and Lower Sorbian, and Russian and Chuvash. Our low-resource systems (German\ensuremathłeftrightarrowUpper Sorbian, Russian\ensuremathłeftrightarrowChuvash) are pre-trained on high-resource pairs of related languages. We fine-tune those systems using the available authentic parallel data and improve by iterated back-translation. The unsupervised German\ensuremathłeftrightarrowLower Sorbian system is initialized by the best Upper Sorbian system and improved by iterated back-translation using monolingual data only.
%U https://aclanthology.org/2021.wmt-1.105/
%P 989-994

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Markdown (Informal)

[The LMU Munich Systems for the WMT21 Unsupervised and Very Low-Resource Translation Task](https://aclanthology.org/2021.wmt-1.105/) (Libovický & Fraser, WMT 2021)

The LMU Munich Systems for the WMT21 Unsupervised and Very Low-Resource Translation Task (Libovický & Fraser, WMT 2021)

ACL

Jindřich Libovický and Alexander Fraser. 2021. The LMU Munich Systems for the WMT21 Unsupervised and Very Low-Resource Translation Task. In Proceedings of the Sixth Conference on Machine Translation, pages 989–994, Online. Association for Computational Linguistics.