Subtitle Loop

Subtitle Loop helps you learn languages on YouTube with bilingual subtitles, sentence looping, repeat practice, inline dictionary, gap skipping, and a transcript panel. This is NOT an official Google or YouTube product. Requirements: - Works only on YouTube videos with captions (CC) available - Both your learning language (top line) and translation language (bottom line) must be obtainable - Does not switch YouTube audio tracks (use YouTube's own audio settings) Languages: - Display language — UI only (default: browser, Japanese or English) - Learning language — top subtitles (default: English) - Translation language — bottom subtitles (default: browser, or pick from 22 languages) Features: - Dual-line bilingual subtitles - Loop & repeat practice (loop off by default) - Hover dictionary (Latin-script learning languages) - Skip silent gaps between cues - Side transcript panel (open by default) - Popup for main settings; options page for help and supplemental settings - No personal data collected How captions load: 1. Fetches learning-language track (top) 2. Translation language (bottom) via native track → YouTube auto-translate → Google Translate 3. If only translation track exists, learning line is filled via Google Translate 4. Top line may appear first; bottom line can take a few seconds 5. Waits until ads finish during ad playback 6. Reload the page if captions fail to load Privacy: No personal data collected. Settings stay in your browser. Dictionary and translation features send text to external APIs when used.