Add multi-language support to the frontend. Extract all hardcoded strings from components and views into locale JSON files. Start with English (default), French, and Dutch.

📝 "i18n" stands for Internationalization, a technical process of designing software or applications so they can easily be adapted to different languages, regions, and cultures without requiring engineering changes. The "18" represents the number of letters between the "i" and "n" in internationalization.