TransLens - Language Learning Tool

Two ways to learn vocabulary from foreign-language pages: ① Select any text → instant translation popup → tap [+] to save to your word library ② Auto-annotation → new words highlighted with inline translations as you browse Both paths feed into a spaced repetition scheduler (SM-2, like Anki) so you review words right before you'd forget them. HOW IT WORKS ① Level check (30 seconds, skippable) Pick your CEFR level (A1–C1) manually or take a quick vocab test. TransLens uses this to skip words you already know. ② Browse any foreign page Visit a page in your target language. TransLens highlights unfamiliar words with dotted underlines and inline translations. Hover for phonetics and CEFR level. ③ Select text to translate See a word you want to look up? Select it → floating button appears → click (or press Alt+T, or right-click → "翻译选中文本"). Translation popup shows the word, meaning, and phonetic. Tap [+] to add it to your learning library. ④ Spaced review Words you save enter the SM-2 scheduler. They come back at increasing intervals — 1 day, 3 days, 7 days — so you remember them long-term. KEY FEATURES 🖱️ Select to translate Select any text on a webpage, click the floating button (or press Alt+T), and get an instant translation. Optionally add the word to your SRS learning library for spaced review. 🎯 Personalized by level Words are filtered based on your CEFR level — no more annotating "the", "is", or "water" for intermediate learners. 🧠 Spaced Repetition (SRS) Built-in SM-2 algorithm tracks easiness, intervals, and mastery. Reviews words just before you forget them. 🤖 AI-Powered Translation Choose from OpenAI, Anthropic, or any OpenAI-compatible endpoint (DeepSeek, Ollama, llama.cpp, etc.). Context-aware, sentence-level translations. 🌍 10 source languages English, Chinese (Simplified/Traditional), Japanese, Korean, French, German, Spanish, Russian, Arabic — or bring your own regex. ⚙️ Customizable Adjust daily new-word caps, selection ratio, annotation size, and disable specific sites (with wildcard support like *.google.com). 🔒 Privacy First All data lives in chrome.storage.local. No accounts, no tracking, no analytics. Text is only sent to the AI provider you configure. FAQ Q: Do I need to import a word list? A: No. TransLens picks words automatically from pages you visit, filtered by your level. You can also add words manually by selecting text and clicking the translate button. Q: Do I need an API key? A: Yes — bring your own OpenAI or Anthropic key, or point TransLens at a local AI server (Ollama, llama.cpp, etc.). Q: Where is my data stored? A: Everything — settings, vocabulary, SRS progress — stays in your browser's chrome.storage.local. Nothing is sent to developer-controlled servers. Q: Why does TransLens need to read web page content? A: To detect foreign-language text and annotate unfamiliar words, and to translate user-selected text. Form fields (search boxes, text areas) are explicitly skipped. SUPPORTED LANGUAGES Source: English, Chinese (Simplified/Traditional), Japanese, Korean, French, German, Spanish, Russian, Arabic, or custom regex Target: English, Chinese, Japanese, Korean, French, German, Spanish PRIVACY POLICY TransLens does not operate a developer server, does not use analytics, and does not sell user data. The level assessment runs entirely on-device. For translation, the extension sends the selected word and surrounding text only to the AI provider you configure. Full privacy policy: https://eatmelon-masses.github.io/privacy-policy/extensions/translens/