LanguageShadow: AI Shadowing for YouTube™
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Master any language on YouTube with AI shadowing and dual subtitles. Your real-time pronunciation coach. LanguageShadow turns any YouTube™ video into active speaking practice. Pick a subtitle line, repeat it out loud, and get an AI pronunciation score on every word. Built for learners who want to speak, not just watch. How it works 1) Enable: Turn on LanguageShadow on a captioned YouTube™ watch page; dual subtitles appear under the player 2) Pick: Practice the current line, or open Transcript to seek and mark a range 3) Listen: Hear the original speaker, then hold to speak your take 4) Score: AI grades Accuracy, Fluency, Completeness, and Prosody (Prosody: English) with word-level tips 5) Loop: In Transcript, Set A then click a line, Set B then click another, then Loop until it sticks 6) Retry: Record another take, compare scores, and move on with Z / X / R Key features • Dual subtitles under the player: native + target, not covering mid-frame • Caption lines: Target, Native, or Both • Cue-index A–B loop: Set A / Set B, then click Transcript lines; Z/X stay inside the loop while it is on • Transcript tab: seek any line; or arm Set A / Set B and click a line to mark • Caption level estimate: ~A1–~C2 hint from your target track (any language) • AI pronunciation scoring: phoneme-aware feedback, not just one vague number • 33 languages and regional voices: English (US/UK/AU/CA/IN), Spanish (Spain/Mexico), French, German, Italian, Portuguese (Brazil/Portugal), Russian, Mandarin (CN/HK/TW), Japanese, Korean, Arabic (Egypt/Saudi), and more • Free for the core loop: dual captions and shadowing with no account. Sign in at Check Score for 10 lifetime AI grades What's new • 2.0: Sign in at Check Score for 10 lifetime AI grades. Dual captions and shadowing stay free with no account • Pro is 1,000 grades per month. Go Pro opens checkout on languageshadow.com • English chrome, score tiers, and a 30 second recording cap Why LanguageShadow • Active practice, not passive watching. Most extensions show subtitles; this one scores how you sound • Real content, not canned dialogues. Practice with the YouTube™ videos you already watch • Honest limits. Free: dual captions + shadowing, then 10 lifetime AI grades after you sign in at Check Score. Pro: 1,000 grades/month for $7.99 (any applicable tax is shown at Paddle checkout before you pay) • YouTube™-native: practice without leaving the page, no separate course library to learn Perfect for • Intermediate and advanced learners moving from comprehension to fluent speaking • Students preparing for IELTS speaking, TOEFL speaking, OPI, Cambridge speaking exams, or job interviews in a second language • Self-learners using YouTube™ shadowing and caption practice as their main daily routine • Polyglots tuning accent and pronunciation across multiple languages • Anyone using comprehensible input who's ready to start producing speech, not just absorbing it Privacy We record audio only when you press the practice button, and use it solely for pronunciation scoring. Optional analytics is off by default. Full policy: https://languageshadow.com/privacy Install LanguageShadow and start speaking the language you're learning today.