Multilingual Sentiment Lexicon Augmentation and Zero-Shot Cross-Lingual Transfer Performance

Abstract

Abstract: Multilingual BERT (mBERT), a language model pre-trained on large multilingual corpora, has impressive zero-shot cross-lingual transfer capabilities and performs surprisingly well on zero-shot POS tagging and Named Entity Recognition (NER), as well as on cross-lingual model transfer. At present, the mainstream methods to solve the cross-lingual downstream tasks are always using the last transformer layer's output of mBERT as the representation of linguistic information. In this work, we explore the complementary property of lower layers to the last transformer layer of mBERT. A feature aggregat

Research Question

How does augmenting pretraining corpora with multilingual sentiment lexicons affect zero-shot cross-lingual transfer performance on the XTREME-R benchmark compared to standard multilingual pretraining?

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