AI dub tool I made to watch foreign language videos with my 7-year-old
Hey HN! I love watching YouTube with my 7-year-old daughter. Unfortunately, the best stuff is often in English (we're German). So I made an AI tool that translates videos directly, using the original voices. All other sounds, as well as background music, are preserved, too. Turns out that it works for many other language pairs, too. So far, it can create dubs in English, Mandarin Chinese, Spanish, Arabic, French, Russian, German, Italian, Korean, Polish and Dutch. The main challenge in building this was to get the balance right between translating the original meaning and getting the timing…
In plain words
This AI tool translates videos into different languages while preserving original speaker voices, background music, and sound effects. It supports eleven languages including English, Mandarin, Spanish, and German. Designed for parents wanting to watch foreign-language content with children, it addresses the technical challenge of matching translations to original timing, particularly for language pairs where translations are longer than the source material.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hey HN! I love watching YouTube with my 7-year-old daughter. Unfortunately, the best stuff is often in English (we're German). So I made an AI tool that translates videos directly, using the original voices. All other sounds, as well as background music, are preserved, too. Turns out that it works for many other language pairs, too. So far, it can create dubs in English, Mandarin Chinese, Spanish, Arabic, French, Russian, German, Italian, Korean, Polish and Dutch. The main challenge in building this was to get the balance right between translating the original meaning and getting the timing right. Especially for language pairs like English -> German, where the target ist often longer than the source ("bat" -> "Fle-der-maus", "speed" -> "Ge-schwin-dig-keit"). Let me know what you think! :)
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