Cross-Lingual Transfer of Cultural Knowledge: An Asymmetric Phenomenon

Fuente: arXiv
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Autores principales: Zhang, Chen, Liao, Zhiyuan, Feng, Yansong
Formato: Preprint
Publicado: 2025
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author Zhang, Chen
Liao, Zhiyuan
Feng, Yansong
author_facet Zhang, Chen
Liao, Zhiyuan
Feng, Yansong
contents Despite substantial research efforts evaluating how well large language models~(LLMs) handle global cultural diversity, the mechanisms behind their cultural knowledge acquisition, particularly in multilingual settings, remain unclear. We study this question by investigating how cultural knowledge transfers across languages during language adaptation of LLMs. We introduce an interpretable framework for studying this transfer, ensuring training data transparency and controlling transfer effects. Through a study of four non-Anglophonic cultures, we observe bidirectional cultural transfer between English and other high-resource languages, while low-resource languages primarily transfer knowledge to English with limited reverse flow. To explain this asymmetric phenomenon, we propose a frequency-based hypothesis: cultural knowledge appearing more frequently in the pretraining data transfers more easily, which is supported by empirical analysis of the training corpora.
format Preprint
id arxiv_https___arxiv_org_abs_2506_01675
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Cross-Lingual Transfer of Cultural Knowledge: An Asymmetric Phenomenon
Zhang, Chen
Liao, Zhiyuan
Feng, Yansong
Computation and Language
Despite substantial research efforts evaluating how well large language models~(LLMs) handle global cultural diversity, the mechanisms behind their cultural knowledge acquisition, particularly in multilingual settings, remain unclear. We study this question by investigating how cultural knowledge transfers across languages during language adaptation of LLMs. We introduce an interpretable framework for studying this transfer, ensuring training data transparency and controlling transfer effects. Through a study of four non-Anglophonic cultures, we observe bidirectional cultural transfer between English and other high-resource languages, while low-resource languages primarily transfer knowledge to English with limited reverse flow. To explain this asymmetric phenomenon, we propose a frequency-based hypothesis: cultural knowledge appearing more frequently in the pretraining data transfers more easily, which is supported by empirical analysis of the training corpora.
title Cross-Lingual Transfer of Cultural Knowledge: An Asymmetric Phenomenon
topic Computation and Language
url https://arxiv.org/abs/2506.01675