Lifting the Curse of Multilinguality by Pre-training Modular TransformersDownload PDF


Mar 08, 2022 (edited May 03, 2022)NAACL 2022 Conference Blind SubmissionReaders: Everyone
  • Abstract: Multilingual pre-trained models are known to suffer from the curse of multilinguality, which causes per-language performance to drop as they cover more languages. We address this issue by introducing language-specific modules, which allows us to grow the total capacity of the model, while keeping the total number of trainable parameters per language constant. In contrast with prior work that learns language-specific components post-hoc, we pre-train the modules of our Cross-lingual Modular (X-Mod) models from the start. Our experiments on natural language inference, named entity recognition and question answering show that our approach not only mitigates the negative interference between languages, but also enables positive transfer, resulting in improved monolingual and cross-lingual performance. Furthermore, our approach enables adding languages post-hoc with no measurable drop in performance, no longer limiting the model usage to the set of pre-trained languages.
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  • Paper Type: Long paper (up to eight pages of content + unlimited references and appendices)
  • Presentation Mode: This paper will be presented in person in Seattle
  • Copyright Consent Signature (type Name Or NA If Not Transferrable): Jonas Pfeiffer
  • Copyright Consent Name And Address: Meta AI
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