Uncovering inequalities in new knowledge learning by large language models across different languages - Chenglong Wang; Haoyu Tang; Xiyuan Yang; Yueqi Xie; Jina Suh; Sunayana Sitaram; Junming Huang; Yu Xie; Pengjun Zhao; Zhaoya Gong; Xing Xie; Fangzhao Wu (Proceedings of the National Academy of Sciences, 2025)