Enhancing Cross-Lingual Dense Retrieval for Long-Tail Queries via WebFAQ Schema Annotations

Abstract

Abstract: Effective cross-lingual dense retrieval methods that rely on multilingual pre-trained language models (PLMs) need to be trained to encompass both the relevance matching task and the cross-language alignment task. However, cross-lingual data for training is often scarcely available. In this paper, rather than using more cross-lingual data for training, we propose to use cross-lingual query generation to augment passage representations with queries in languages other than the original passage language. These augmented representations are used at inference time so that the representation can enco

Research Question

Does incorporating WebFAQ's diverse FAQ-style schema annotations improve the alignment of dense retrieval models for long-tail question distributions in cross-lingual settings?

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