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Graph Algorithms for Multiparallel Word Alignment

Ayyoob Imani 1 Masoud Jalili Sabet 1 Lütfi Keremşenel 1 Philipp Dufter 1 François yvon 2 Hinrich Schütze 1 
2 TLP - Traitement du Langage Parlé
LISN - Laboratoire Interdisciplinaire des Sciences du Numérique, STL - Sciences et Technologies des Langues
Abstract : With the advent of end-to-end deep learning approaches in machine translation, interest in word alignments initially decreased; however, they have again become a focus of research more recently. Alignments are useful for typological research, transferring formatting like markup to translated texts and can be used in the decoding of machine translation systems. At the same time, massively multilingual processing is becoming an important NLP scenario and pretrained language and machine translation models that are truly multilingual are proposed. However, most alignment algorithms rely on bitexts only and do not leverage the fact that many parallel corpora are multiparallel. In this work, we exploit multiparallelity of corpora by representing an initial set of bilingual alignments as a graph and then predicting additional edges in the graph. We present two graph algorithms for edge prediction: one inspired by recommender systems and one based on network link prediction. Our experimental results show absolute improvements of F 1 of up to 28% over the baseline bilingual word aligner in different datasets.
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Contributor : François Yvon Connect in order to contact the contributor
Submitted on : Wednesday, November 10, 2021 - 11:56:12 AM
Last modification on : Sunday, June 26, 2022 - 3:18:58 AM
Long-term archiving on: : Friday, February 11, 2022 - 6:39:23 PM


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  • HAL Id : hal-03424044, version 1


Ayyoob Imani, Masoud Jalili Sabet, Lütfi Keremşenel, Philipp Dufter, François yvon, et al.. Graph Algorithms for Multiparallel Word Alignment. The 2021 Conference on Empirical Methods in Natural Language Processing, Association for Computational Linguistics, Nov 2021, Punta Cana, Dominica. ⟨hal-03424044⟩



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