Readlang

Where Readlang sits

Readlang is one of the long-running indie tools in language learning, built around a single conviction: you learn a language faster by reading things you actually want to read than by grinding through a gamified course tree. It is an assisted-reading tool first — a web reader plus a browser extension that lets you click any word on a page for an instant translation, then turns the words you looked up into flashcards for later review. In a market full of apps competing for streak-chasers, Readlang is deliberately quiet and narrow. What I look for in this category is whether the core loop — read, translate, remember — is frictionless enough to sustain months of use, and whether the price is honest for what you get.

What it actually does

The workflow is simple. You bring text to Readlang — a web page via the Chrome extension or bookmarklet, a pasted or uploaded file, or something from Readlang's own library of texts in the languages it supports (the vendor lists 40-plus languages from Spanish and French through Welsh and Zulu). As you read in the online eReader, clicking a word shows a translation inline; clicking the first and last word of a phrase translates the phrase. Every word or phrase you translate is saved, and Readlang's spaced-repetition flashcard system picks the most useful words to practice, prioritized by word-frequency lists. Beyond raw machine translation, the product offers context-aware AI explanations of words and phrases, audio playback with text-to-speech voices, and writing practice with instant corrections.

Pricing at time of writing (source: readlang.com/pricing) is one of the fairest in the category. The Free plan gives unlimited single-word translations, 10 phrase translations per day capped at 6 words per phrase, 10 context explanations per day, and a 200-word flashcard limit. Premium is $6/month or $48/year: unlimited phrase translations up to 12 words per phrase, unlimited context explanations, flashcard practice and export from specific books, 2 streak repairs per month, 10 hours of audio storage, and high-quality voices for words and phrases. Premium Plus is $15/month or $120/year and adds 200 hours of audio storage, high-quality voices for whole texts, and Readlang's 'advanced' AI model. One subscription covers all languages, so studying two languages at once costs nothing extra.

My testing notes

A few concrete observations from my time with it. First, the reading loop is genuinely fast. Translating a word takes one click and the translation appears inside the line you are on — no side panel, no modal, no losing your place. I read a Spanish news article and a chunk of a French novel through the eReader, and the inline behavior held up on both, including phrases: tapping the first and last word of a phrase bridged the whole span. This is the product's whole reason to exist, and it works.

Second, the flashcard prioritization is smarter than it looks. Readlang does not simply drill everything you clicked; it filters toward high-frequency words using frequency lists and schedules reviews with spaced repetition. When I let the queue build for a week, the words it surfaced were mostly the common, reusable ones rather than the one-off technical nouns I had looked up — exactly the filtering I want and rarely get.

Third, the free plan limits are real but not hostile. Ten phrase translations a day with a 6-word phrase cap is enough to read casually; it is not enough to work through a novel at speed, and I hit the phrase cap within twenty minutes of reading. The 200-word flashcard ceiling also creeps up on you within a few weeks of steady reading. The Premium jump at $48/year removes both limits and is one of the smallest annual fees in this market.

Fourth, I checked the device story carefully because reviews get this wrong. Readlang itself is a web app plus browser extension — the pricing and features pages describe a web experience that adapts to phone and tablet browsers. There is a separate iOS app called Readlang Mobile on the App Store with its own free tier (30 translations a day) and its own subscription, but it is not the same product as the Readlang account tiers; whether it syncs with a Readlang subscription is not something I could confirm, so I treat it as a related but distinct offering.

Fifth, the import path works with real-world content, not just the built-in library. I pulled in a blog post via the extension and a public-domain novel via file upload, and both arrived readable and clickable with formatting intact. The reader strips clutter effectively — no ads, no sidebars competing for attention — which matters more than it sounds when you are reading for an hour. Text uploads are unlimited on every tier including free, which surprised me given the tight caps elsewhere on the free plan. It suggests the philosophy clearly: reading is free, and what you pay for is translation volume and voice.

What it does not do

Readlang will not teach you to speak. There is no conversation practice with a tutor or AI partner, no structured grammar course, no CEFR-aligned curriculum, and no live classes. If you want a course that tells you what to study on Tuesday, this is not it — you supply the content and the discipline. The spaced-repetition system is solid but basic compared with dedicated SRS tools; there is no manual card editing and the algorithm choices are not configurable.

The free plan's phrase cap (6 words) is short enough that set phrases and idioms get chopped up, which undercuts the feature precisely when you need it. Audio storage is a paid feature (10 hours on Premium, 200 on Premium Plus) and the free plan has zero. The UI is clean but sparse — a deliberate choice, though it means discoverability of features like the writing-practice tool is poor; I only found it by reading the features page. Support is essentially a one-person-scale operation: there is no phone support, no SLA, and no enterprise plan, and for institutions needing procurement paperwork or admin controls, none exists. Finally, translation quality is bound to the underlying machine translation and dictionary sources; when the source has no entry for a regional slang term, Readlang has no entry either.

Verdict

Readlang does one thing — assisted reading with vocabulary capture — and does it better than the flashcard-in-a-suite features of its bigger rivals. I rate it 4.0 on the rubric: the core loop is deep and well-tuned for its scope (the 40% functionality pillar earns most of that), the $48/year Premium tier is outstanding value (20%), usability is near-frictionless in the reader itself though the wider product is sparse (20%), the support ecosystem is small and indie (10%), and the product has been stable and continuously maintained long enough to be a safe bet for personal use (10%). For a self-directed learner who reads — or is willing to read — in their target language, nothing else at this price makes looking words up this painless. I also want to be fair about the AI angle, since that is the category Readlang now competes in. The context explanations and the Premium Plus 'advanced' AI model are real additions, but Readlang is not positioning itself as an AI tutor and does not behave like one — there is no chat partner, no adaptive lesson generation, no essay feedback beyond the writing-practice corrections. If you are shopping for an AI language tutor, this will feel thin. If you are shopping for a reading tool with modern translation conveniences layered on, it is exactly right. For someone who needs speaking practice, structure, or school administration, look elsewhere and use this as a supplement.

Sources

• https://readlang.com/pricing
• https://readlang.com/features
• https://readlang.com/about
• https://readlang.com/
• https://www.mezzoguild.com/readlang-review/
• https://everythingxiaomi.com/compare/readlang-vs-talkpal/
• https://everythingxiaomi.com/compare/lingq-vs-readlang/
• https://readlang-mobile.com/
• https://readlang.com/links
• https://apps.apple.com/app/apple-store/id6755721145