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Japanese and English captions, translated as the video plays

Wuai is a free app for Windows and Android that captions the videos you watch and translates the captions in real time, on your device. These screenshots show it turning Japanese speech into English captions and English speech into Japanese captions, on Windows and on Android.

Japanese captions as a Japanese video plays

Recorded in Wuai on Windows with Plus, the free speech model, not sped up: Japanese speech with Japanese captions, such as “支援をいたします。これによりまして、”, and no translation. Each line comes a moment after it is said; turn on Wait for captions and the video waits for it. Video: 高市内閣総理大臣会見ー令和8年5月25日 by 首相官邸, CC BY 4.0, on Wikimedia Commons.

A Japanese video with English captions

Wuai on Windows: a Japanese video with English captions, “5,000 yen for a standard household over three months.” over “標準的なご家庭におきまして”.
Windows: 標準的なご家庭におきまして → 5,000 yen for a standard household over three months.

Video: 高市内閣総理大臣会見ー令和8年5月25日 by 首相官邸, CC BY 4.0, on Wikimedia Commons.

An English video with Japanese captions

Wuai on Windows: a English video with Japanese captions, “私はキャサリン・トラウマンです。” over “I am Catherine Trautmann.”.
Windows: I am Catherine Trautmann. → 私はキャサリン・トラウマンです。
Wuai on Android: a English video with Japanese captions, “私はキャサリントラウトマンです。” over “I am Catherine Trautmann.”.
Android: I am Catherine Trautmann. → 私はキャサリントラウトマンです。

Video: Trautmann, Catherine (en) by Manuel Schneider, CC BY 3.0, on Wikimedia Commons.

How to

  1. Open the video in Wuai: go to its website, or paste its link. A video file works too.
  2. Turn on captions: Captions beside the video on Windows, CC on Android.
  3. Under Spoken language, keep Auto-detect or choose the language spoken.
  4. Turn on Translate captions and choose Japanese or English under Translate to.
  5. Under Show, tick Original too to see both lines, as here.

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Where

Wuai translates captions into Japanese on Windows and Android, and makes captions from Japanese speech on both. See every language.

Shot on November 1, 2026 with Wuai Pro switched on, the captions as Wuai made them. Other speech and translation models' captions can differ. Android and Windows translate 30 minutes of video for free; iPhone and Mac require Pro for translation.

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