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How multilingual is Multilingual BERT - 2019

Research Area:  Machine Learning


In this paper, we show that Multilingual BERT (M-BERT), released by Devlin et al. (2018) as a single language model pre-trained from monolingual corpora in 104 languages, is surprisingly good at zero-shot cross-lingual model transfer, in which task-specific annotations in one language are used to fine-tune the model for evaluation in another language. To understand why, we present a large number of probing experiments, showing that transfer is possible even to languages in different scripts, that transfer works best between typologically similar languages, that monolingual corpora can train models for code-switching, and that the model can find translation pairs. From these results, we can conclude that M-BERT does create multilingual representations, but that these representations exhibit systematic deficiencies affecting certain language pairs.

Author(s) Name:  Telmo Pires, Eva Schlinger, Dan Garrette

Journal name:  Computer Science

Conferrence name:  

Publisher name:  arXiv:1906.01502

DOI:  10.48550/arXiv.1906.01502

Volume Information: