Worked on enhancing the rdkcentral/rdk-halif-device_settings module by updating the documentation for the dsSetSecondaryLanguage API. Focused on clarifying the language selection logic, the update specified that the primary language takes precedence, and the secondary language is used only if the primary is unavailable and configured. This documentation improvement aimed to reduce configuration errors and improve developer understanding for downstream integrations. Leveraged skills in API development and technical documentation, with work primarily in C. The contribution addressed potential misconfigurations in language settings, supporting more robust and predictable behavior for applications relying on this API within the RDK ecosystem.