TY - GEN T1 - Mitigating Catastrophic Forgetting in Target Language Adaptation of LLMs via Source-Shielded Updates T2 - arXiv PY - 2025/12/04 AU - Yamaguchi A AU - Morishita T AU - Villavicencio A AU - Aletras N ED - DO - DOI: 10.48550/arxiv.2512.04844 Y2 - 2026/01/29 ER -