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Welsh 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 Welsh speech into English captions and English speech into Welsh captions, on Windows and on Android.

A Welsh video with English captions

Wuai on Windows: a Welsh video with English captions, “before I go to university to tell the truth.” over “cyn i mi fynd i prifysgol ddeud y gwir.”.
Windows: cyn i mi fynd i prifysgol ddeud y gwir. → before I go to university to tell the truth.

Video: WIKITONGUES- Sandra speaking Welsh by Wikitongues, CC BY 3.0, on Wikimedia Commons.

An English video with Welsh captions

Wuai on Windows: a English video with Welsh captions, “Rwyf yn Catherine Trautmann.” over “I am Catherine Trautmann.”.
Windows: I am Catherine Trautmann. → Rwyf yn Catherine Trautmann.
Wuai on Android: a English video with Welsh captions, “Fi yw Catherine Trautmann.” over “I am Catherine Trautmann.”.
Android: I am Catherine Trautmann. → Fi yw Catherine Trautmann.

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 Welsh or English under Translate to.
  5. Under Show, tick Original too to see both lines, as here.

Download free See it work

Where

Wuai translates captions into Welsh on Windows and Android, and makes captions from Welsh 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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