PolyGlot AI is a full-featured AI-powered multi-language learning assistant supporting 20+ languages. Built entirely with Vue 3 + TypeScript, it combines intelligent vocabulary management, diverse learning modes, AI-generated daily articles, RSS news reading, and a customizable learning dashboard — all running locally in the browser with no backend server required.
Core Features
Vocabulary Management
- Create and manage multiple word books
- Morphological variation support (case declension, tense, etc.)
- AI batch-generated example sentences via DeepSeek API
- Word relationship graph visualization
- Advanced filtering and fuzzy search
7 Learning Modes
- Flashcard — classic spaced repetition with configurable intervals
- Multiple Choice — test recognition under time pressure
- Listening — Web Speech API pronunciation + comprehension drills
- Spelling — type the word from memory
- Speaking — speech recognition powered oral practice
- Comprehensive — mixed-mode assessment combining all skills
- Writing — AI-graded free-form composition
All modes integrate an Ebbinghaus forgetting-curve review scheduler and an intelligent wrong-exercise bank that adapts to individual weak points.
AI Daily Articles
- Personalized article generation via DeepSeek AI
- Three translation modes: original-only, paragraph-parallel, full-translation
- A-B loop audio playback for intensive listening
- Hover-to-translate vocabulary tooltips
Multi-language News
- 20+ language RSS news sources aggregated in-app
- AI deep analysis: difficulty rating, key sentences, vocabulary extraction
- Key sentence and keyword highlighting
- Real-time highlight during audio playback
- Bookmark and export functionality
AI Chat Assistant
- Interactive conversational learning powered by DeepSeek
- On-demand grammar explanations
- Context-aware example sentence generation
- Personalized study suggestions
Learning Dashboard
- 15 customizable widgets: learning clock, streak counter, weekly progress, accuracy charts, vocabulary growth, upcoming reviews, and more
- Drag-and-drop dashboard layout editor
- AI-generated daily learning reports
- Intelligent time tracking based on mouse activity
Technical Stack
- Frontend: Vue 3 (Composition API) + TypeScript
- State Management: Pinia
- Build Tool: Vite
- Charts: Chart.js
- AI Service: DeepSeek API
- Storage: LocalForage (IndexedDB) — fully offline data persistence
- Speech: Web Speech API (synthesis + recognition)
Architecture
The application follows a modular architecture with feature-based component organization. Core learning logic is decoupled from UI through Pinia stores (stores/learning.ts, stores/vocab.ts, stores/user.ts), while utility modules handle specialized concerns like spaced-repetition scheduling (utils/reviewScheduler.ts), morphological analysis (utils/languageMorphology.ts), and AI integration (utils/aiHelper.ts). All user data persists locally in IndexedDB via LocalForage, making the application fully self-contained with no server-side dependency.