YouTube二言語字幕 & AI字幕翻訳 - Fluently

AI搭載のYouTube字幕翻訳ツール。20以上の言語で二言語字幕を表示。音声から直接文字起こし、自動字幕より正確。

Fluently gives you accurate, AI-powered subtitles for any YouTube video in 20 languages. No more broken auto-translated captions. Fluently uses AI to transcribe the raw audio and translate it properly with dedicated AI translation models, so you actually understand what's being said. A better alternative to YouTube's built-in auto-translate, Language Reactor, and Immersive Translate for anyone who needs accurate subtitle translations. KEY FEATURES: • Accurate AI Translation: Fluently understands context, tone, and meaning behind what's being said in the video. • Dual Subtitles: See original and translated text side by side while you watch. • Translation Notes: Explanations for grammar patterns, cultural references, and non-literal translations • 20 Languages — English, Spanish, French, German, Portuguese, Italian, Japanese, Korean, Chinese (Simplified & Traditional), Arabic, Hindi, Russian, Turkish, Dutch, Polish, Swedish, Indonesian, Vietnamese, Thai. • Works on Any YouTube Video — Vlogs, lectures, podcasts, interviews, music videos. If it has audio, Fluently can translate it. • Real-Time Streaming — Subtitles appear progressively as they're generated. Start watching within seconds. • Full Customization — Adjust font size, weight, color, position, and background for both original and translated subtitles. HOW IT WORKS: 1. Open any YouTube video 2. Click the Translate button 3. AI-generated subtitles appear automatically, synced to the video 4. Ask any question about specific segments, great for language learners WHY FLUENTLY? Unlike other subtitle translation extensions that translate YouTube's existing (inaccurate) auto-captions, Fluently generates entirely new subtitles from the audio using AI and dedicated translation models. The result is dramatically more accurate translations, especially for content with accents, slang, or technical vocabulary. If you've tried auto-translate, dual subtitle tools, or language learning extensions and been frustrated by subtitle quality, Fluently is built to solve exactly that problem. PERFECT FOR: • Language learners who want real-world practice beyond Duolingo • Anyone who watches foreign-language YouTube content • Students studying with lectures in other languages • Fans of international content creators and vloggers • Travelers preparing with foreign-language travel vlogs