A massively multilingual NMT encoder beats multilingual BERT in zero-shot cross-lingual transfer on 4 of 5 NLP tasks, but loses badly on named entity recognition.
A Survey Of Cross-lingual Word Embedding Models
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abstract
Cross-lingual representations of words enable us to reason about word meaning in multilingual contexts and are a key facilitator of cross-lingual transfer when developing natural language processing models for low-resource languages. In this survey, we provide a comprehensive typology of cross-lingual word embedding models. We compare their data requirements and objective functions. The recurring theme of the survey is that many of the models presented in the literature optimize for the same objectives, and that seemingly different models are often equivalent modulo optimization strategies, hyper-parameters, and such. We also discuss the different ways cross-lingual word embeddings are evaluated, as well as future challenges and research horizons.
fields
cs.CL 1years
2019 1verdicts
CONDITIONAL 1representative citing papers
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Evaluating the Cross-Lingual Effectiveness of Massively Multilingual Neural Machine Translation
A massively multilingual NMT encoder beats multilingual BERT in zero-shot cross-lingual transfer on 4 of 5 NLP tasks, but loses badly on named entity recognition.