They are not automatically translated. The owner of the video has chosen to translate the title in several languages. For example this channel uses this feature

They are not automatically translated. The owner of the video has chosen to translate the title in several languages. For example this channel uses this feature [1]. The English titles are almost always "Sharpest * kitchen knife in the world". The original Japanese titles are more creative, usually something like "I tried to <do something>" and rarely mention knives at all. [1] https://www.youtube.com/channel/UCg3qsVzHeUt5_cPpcRtoaJQ/videos https://www.youtube.com/channel/UCg3qsVzHeUt5_cPpcRtoaJQ/vid...