Youtube ruins videos with godawful AI-generated autodubbing if it detects a video in a language that differs from your locale. You can access the original audio from the settings cog.
YouTube is literally unusable without browser extensions or a third-party app
I learned English when I was a child because all the media I wanted to consume were not translated into Dutch.
Makes you wonder if universal translators ever become the norm people will still bother to learn foreign language.
It doesn't even respect the locale of the user interface, but uses IP geolocation and sends you HTML containing the video titles in the language it "knows" you want... And there is no setting to change this.