LingoHey

Look up words, translate sentences, and read web pages side by side with their translation as you browse.

LingoHey helps you learn English while you read the web and watch videos: look up words, translate sentences, read pages side by side with their translation, watch YouTube and Bilibili with bilingual subtitles, and keep every word you looked up in a vocabulary list. 📖 Look up words instantly • Double-click or select a word to see US / UK phonetics, pronunciation and concise definitions — the 10,000 most common words open instantly from a built-in dictionary • Inflected forms are explained (showed → past tense of show), and word forms are clickable • URLs, file names and code identifiers are split into real words (getElementById → get / element / by / id) • AI explains what the word means in the sentence you found it in (free quota when signed in) • Keep looking things up inside a card; step back and forth through this page's lookups with ← / → and jump back to where you found them 📝 Translate sentences • Select a sentence or paragraph to translate it; long passages are shown sentence by sentence, side by side • Picks the fastest available engine among Google, Microsoft and Tencent, and switches automatically if one fails • AI translation, aligned sentence by sentence, switchable with machine translation (free quota when signed in) • Drag, pin and resize cards, or view results in Chrome's side panel 🎬 Bilingual video subtitles (YouTube, Bilibili) • English subtitles with a translation line, highlighting the word being spoken • Smart merge: the creator's accurate text with auto-caption word timing; fragments merged into full sentences • Any subtitle track is enough to get both languages (videos in other languages can show three lines) • Click a word in the subtitles to look it up, select to translate a sentence; the video pauses while you look (configurable) • A / S / D for previous sentence, replay, next sentence; clickable subtitle list • Your vocabulary list remembers the video and timestamp so you can jump back 🧾 Video summary • One click for an overview, chapters and key points with clickable timestamps • For English videos: expressions worth learning (with the original sentence) plus difficulty and speaking speed ⚡ Quick lookup window • Copy text in any app and press ⌘⇧2 (Windows: Ctrl+Shift+2) to look it up in a small LingoHey window • Change the shortcut in Chrome to whatever suits you 🌐 Side-by-side page translation • One click (Alt+A) shows each paragraph of the article followed by its translation • Smart scope: translates the main content and skips navigation, file names and code — choose Focused / Main content / Main + long sentences / Full page for each website • Hold Alt (⌥) and click any paragraph to translate just that part; English comments in code blocks are translated too • Optional learning style: translations stay blurred until you hover 📚 Vocabulary list • When signed in, every word you look up is saved — grouped by its base form, with the sentence and where you met it (page or video timestamp) — to review at ext.lingohey.com • Privacy first: a notice before anything is saved, sensitive URL parameters removed, nothing recorded in incognito windows, on private networks or sign-in pages; exclude sites or delete records any time 🧘 Stays out of your way • Cards appear when results are ready, without flashing spinners; mostly-Chinese text isn't sent for translation • Single-key actions on cards: S speak, F favorite, M mastered, A AI, C copy • Turn off just this time, for a site, or everywhere; sign-in, payment and banking pages stay quiet by default, with every rule configurable • Light and dark themes; Chinese and English interface Note: definitions and translations are currently provided in Simplified Chinese.