TY - JOUR T1 - Mitigating Catastrophic Forgetting in Target Language Adaptation of LLMs via Source-Shielded Updates. JO - CoRR PY - 2025/12/01 AU - Yamaguchi A AU - Morishita T AU - Villavicencio A AU - Aletras N ED - VL - abs/2512.04844 Y2 - 2026/02/08 ER -