Enhancing Cross-lingual Transfer by Manifold MixupDownload PDF

29 Sept 2021, 00:33 (modified: 09 May 2022, 06:44)ICLR 2022 PosterReaders: Everyone
Keywords: cross-lingual transfer, cross-lingual understanding, manifold mixup
Abstract: Based on large-scale pre-trained multilingual representations, recent cross-lingual transfer methods have achieved impressive transfer performances. However, the performance of target languages still lags far behind the source language. In this paper, our analyses indicate such a performance gap is strongly associated with the cross-lingual representation discrepancy. To achieve better cross-lingual transfer performance, we propose the cross-lingual manifold mixup (X-Mixup) method, which adaptively calibrates the representation discrepancy and gives a compromised representation for target languages. Experiments on the XTREME benchmark show X-Mixup achieves 1.8% performance gains on multiple text understanding tasks, compared with strong baselines, and significantly reduces the cross-lingual representation discrepancy.
One-sentence Summary: We propose the cross-lingual manifold mixup method to improve the cross-lingual transfer.
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