Contributed to the logto-io/logto repository by implementing Czech language localization across the user interface and error messages, enhancing accessibility for Czech-speaking users. The work involved front end development using TypeScript, with a focus on internationalization and localization best practices. Addressed a build issue by identifying and adding missing translation keys, ensuring complete translation coverage and resolving errors. Collaborated with other contributors to refine translations, correcting typos and improving formatting consistency. Additionally, laid the foundation for future localization efforts by preparing the codebase for additional locales, supporting a scalable approach to multilingual user experiences in upcoming development cycles.