Internationalization Support for Applications Built with MIT App Inventor

This project aims to introduce a scalable and maintainable internationalization (i18n) system for applications built using MIT App Inventor. Currently, App Inventor does not provide a structured approach for handling multi-language support, making it difficult for developers to create globally accessible apps. The proposed solution introduces a key-based translation system that decouples user-visible text from UI components. The system integrates across multiple layers of App Inventor, including the Designer, Blockly, runtime, and build system, enabling automatic translation handling in generated applications. Key features include: - Automatic detection of user-visible text from component properties and Blockly blocks - A centralized translation editor for managing multi-language content - Context-based key generation to ensure stability and avoid ambiguity - Runtime translation using JSON for flexibility during development (Companion) - Build-time generation of native Android/iOS resources for efficient production builds The system is designed to be fully backward compatible and supports progressive adoption, allowing existing projects to continue working while enabling developers to gradually migrate to the new translation model. Deliverables include: - A working runtime translation system for App Inventor apps - Integration with Blockly for key-based text handling - Designer-level synchronization and key management - Build-time resource generation for native localization - End-to-end tested implementation with documentation