It's mind-boggling and insane how hostile YT became to multilingualism. You'd think that out of the hundreds of people involved in this project, at least one would've been bilingual and experienced this hostility firsthand. I can't even come up with any explanations for how this happened, except for no one important being bilingual (or even having thought of bilingual people), and/or some kind of systemic flaw that lets these breaking changes slip into the final product.

YouTube doesn't care about the languages listed in your Google account, as everything else does. It doesn't care what content you watch. The algorithm seemingly takes your display language and forces poorly AI-translated content down your throat, more often than not completely obliterating any coherence the original video had. And this change is forced upon you, you must watch it in the language YouTube decides you have to watch it in.

There is a browser extension that reverts this behavior to how it used to be and makes YouTube load the proper audio track. What happens when that stops working?