PolyGlot AI - Multi-language Learning Assistant

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.