About
Readlang is an immersive language learning tool built around the principle of extensive reading. Instead of rote memorization or isolated drills, Readlang helps you acquire vocabulary in context by letting you read articles, books, songs, and web pages in over 100 languages. When you encounter an unfamiliar word, simply click it to get an instant translation — no switching tabs or copying text into a separate translator. Every word and phrase you translate is automatically saved to a smart flashcard system powered by spaced repetition, so you review vocabulary right when you're about to forget it. AI-powered context-aware explanations go beyond simple dictionary definitions, helping you understand nuance and usage. You can upload your own texts, read curated content on the Readlang site, or install the browser extension to use Readlang on any website you visit. Mobile apps for iOS and Android let you continue learning on the go. Readlang offers a free tier for casual learners and affordable Premium plans for unlimited translations, longer phrase lookups, and more powerful AI features. Trusted by polyglots, ESL learners, and self-study enthusiasts, Readlang is ideal for anyone who wants to turn screen time into meaningful language acquisition.
Key Features
- Click-to-Translate: Instantly translate any word or phrase in your reading material with a single click — no copy-pasting or switching apps needed.
- Smart Spaced-Repetition Flashcards: Every word you translate is saved and scheduled for review using spaced repetition, maximizing long-term vocabulary retention.
- AI Context-Aware Explanations: Go beyond basic definitions with AI-powered explanations that clarify meaning, usage, and nuance within the context of your reading.
- Browser Extension & Multi-Platform Support: Use Readlang on any website via the Chrome extension, or read on the go with dedicated iOS and Android apps.
- 100+ Language Support: Learn Spanish, French, German, Russian, Japanese, and over 100 other languages using authentic texts and content you actually enjoy.
Use Cases
- A Spanish learner reads authentic news articles and novels, clicking unfamiliar words to translate them in-context and automatically building a personalized flashcard deck.
- An ESL student uploads their course reading materials to Readlang and uses AI explanations to understand idiomatic English phrases in context.
- A polyglot uses the Chrome extension to read foreign-language websites and social media, turning everyday browsing into immersive language practice.
- A self-study learner practices vocabulary retention through daily spaced-repetition flashcard sessions built entirely from words they encountered while reading.
- A traveler preparing for a trip reads articles about their destination in the local language, building practical vocabulary ahead of their journey.
Pros
- Seamless Reading Experience: The click-to-translate workflow keeps you immersed in your reading instead of constantly interrupting your flow to look things up.
- Vocabulary Learned in Context: Words are acquired from real sentences you encountered, making them far easier to remember than isolated vocabulary lists.
- Generous Free Tier: The free plan allows unlimited single-word translations and basic flashcard practice, making it accessible to budget-conscious learners.
- Wide Content Flexibility: Upload your own texts, use curated site content, or apply the browser extension to virtually any web page.
Cons
- Phrase Translation Limits on Free Plan: The free tier restricts phrase translations to 10 per day with a maximum of 6 words per phrase, which can feel limiting for intensive readers.
- Best Suited for Reading-Focused Learners: Readlang focuses on reading and vocabulary; it does not offer speaking, listening, or grammar-focused exercises, so it works best as a complement to other methods.
- Premium AI Features Require Higher Tier: The most powerful AI context explanations and unlimited phrase translations are locked behind paid plans.
Frequently Asked Questions
What languages does Readlang support?
Readlang supports over 100 languages, including Spanish, French, German, Italian, Portuguese, Russian, Dutch, Swedish, Japanese, Chinese, and many more.
Is Readlang free to use?
Yes, Readlang has a free plan with unlimited single-word translations and basic flashcard practice. Premium plans starting at $6/month unlock unlimited phrase translations, advanced AI features, and more.
How does the spaced-repetition flashcard system work?
Every word or phrase you translate is saved to your personal vocabulary list. Readlang's flashcard system schedules reviews at optimal intervals based on spaced repetition, so you study words right before you're likely to forget them.
Can I read my own books or articles on Readlang?
Yes. You can upload your own texts and articles directly to Readlang, or use the browser extension to read any web page with Readlang's translation overlay.
Does Readlang have a mobile app?
Yes, Readlang is available on iOS and Android, allowing you to continue reading and reviewing flashcards on the go.
