Worked on the holidayextras/partner-api-docs repository to enhance internationalization and developer experience for booking APIs. Introduced a mandatory lang property across lounge, parking, and transfers endpoints, enabling support for European product language requirements. Focused on API documentation using Markdown, consolidating and clarifying usage, defaults, and supported languages for the lang parameter to reduce integration ambiguity. Improved documentation structure and wording for maintainability and ease of use. Added setup instructions for OpenSSL 1.1 with Homebrew to streamline Ruby environment configuration. The work emphasized API documentation and operational clarity, delivering three features that expand global reach without addressing critical bugs.