During August 2025, ChuijkYahus delivered a complete Chinese localization for the Terralith Mod (v1.21.1) within the ChuijkYahus/Minecraft-Mod-Language-Package repository. Focusing on localization and modding, ChuijkYahus restructured JSON language files to support a modular 1.21.1 Chinese localization pack, enabling easier future updates and integration. The technical approach emphasized maintainability, with clear commit messages and a coherent change history to facilitate knowledge transfer. By enhancing accessibility for Chinese-speaking Minecraft players, the work addressed a key user need and expanded the mod’s reach. No bugs were documented, reflecting a focused, feature-driven contribution over the one-month development period.