Relingo

Relingo is a browser extension and mobile app that helps you build vocabulary naturally while you browse the web, watch YouTube, or read news. Instead of flashcards or drills, it highlights unfamiliar words on any page and shows translations, usage, and memory-tracking — all without interrupting your flow.

What problem does it solve?

Traditional language learning requires dedicated study time. Relingo solves this by embedding learning into everyday browsing — on BBC, Medium, Twitter, Facebook, YouTube, and more. Its AI-powered spaced repetition system identifies words you're about to forget and surfaces them again, reinforcing memory while you read what interests you.

Who is it for (and who is it not for)?

Relingo is best for intermediate language learners, polyglots managing multiple languages, or anyone who wants to expand vocabulary passively through real-world content. It supports English, Japanese, Chinese, Korean, Spanish, French, German, Portuguese, Russian, Arabic, and more. It is not a full language course — it won't teach grammar or conversation from scratch. Beginners may still need a structured course alongside it.

Real use cases

• Read BBC news with automatic word highlights and instant translation
• Watch YouTube with dual subtitles (bilingual) and study vocabulary in context
• Listen to podcasts with bilingual subtitles and word lookup
• Read PDF files with bilingual translation and highlight unknown terms
• Use RSS subscriptions to turn feeds into daily learning material

• AI-Powered Word Highlighting — automatically detects and highlights unfamiliar words based on your level and saved vocabulary
• Contextual Translation — hover or click any word to see its meaning, usage in the sentence, and real pronunciation examples
• Spaced Repetition System — reviews saved words on a forgetting curve to strengthen long-term retention
• YouTube & Podcast Dual Subtitles — add bilingual subtitles while watching or listening, and study vocabulary from media
• Immersive Translate — multiple translation modes (word, sentence, paragraph, full-page) for seamless reading
• Progress Tracking & Reports — dashboard shows words learned, reading time, retention rate, and daily email flushing
• Multi-Language & Dictionary Support — learn English, Japanese, Chinese, Korean, Spanish, French, German, Portuguese, Russian, Arabic and more; access multiple dictionaries for comprehensive meanings