Worked on the apache/hertzbeat repository to address a critical localization issue affecting translation accuracy for user-facing text. Delivered a targeted bug fix in Java that modified the i18n translation lookup logic, ensuring that application names are used as case-sensitive keys in the i18nMap rather than being lowercased. This adjustment resolved errors where translations failed for app names containing uppercase letters, thereby improving internationalization support and reducing potential localization-related support requests. Demonstrated skills in bug fixing and internationalization by diagnosing the root cause, implementing a minimal-risk patch, and maintaining codebase stability while enhancing the user experience across multiple locales.