Adversarial Training Effects on XLM-R Embedding Alignment and Zero-Shot Classification

Pre-trained multilingual language encoders, such as multilingual BERT and XLM-R, show great potential for zero-shot cross-lingual transfer. However, these multilingual encoders do not precisely align words and phrases across languages. Especially, learning alignments in the multilingual embedding space usually requires sentence-level or word-level parallel corpora, which are expensive to be obtained for low-resource languages. An alternative is to make the multilingual encoders more robust; when fine-tuning the encoder using downstream task, we train the encoder to tolerate noise in the contex

Research goal: What is the impact of adversarial training on multilingual XLM-R's alignment quality in the embedding space, measured by cross-lingual similarity metrics, and how does this correlate with zero-shot classification accuracy on XTREME-R?

Autonomous synthesis report generated by Assignee Research. Tribunal consensus score: 7.8/10.