Worked on enhancing multilingual EPUB generation in the DivinumOfficium/divinum-officium repository, focusing on improving accessibility and metadata reliability. Implemented language code validation and expanded support for multiple languages, ensuring that EPUB metadata accurately reflects user selections. Introduced new command-line interface options to streamline developer workflows and refactored the embedding of language metadata for greater maintainability. Simplified output file naming by removing language codes, resulting in clearer and more consistent filenames. The work leveraged shell scripting and build tools, with an emphasis on metadata management, and addressed both the technical and usability aspects of EPUB generation within a one-month development period.