Worked on refining the profanity filtering system for the lichess-org/lila repository, addressing a false positive detection of the word 'hangi' in user chats. The solution involved updating the filter dictionary, tightening regular expression patterns, and expanding the automated test suite to ensure ongoing accuracy. Using Scala and Python regex, the developer focused on backend development and test-driven methodologies, integrating changes through continuous integration pipelines. This work improved the reliability of content moderation, reduced unnecessary moderation alerts, and enhanced the overall user experience in community features. The approach demonstrated careful attention to language-aware filtering and robust, CI-validated code quality practices.