I'm learning a language, and I'd love to be able to filter Netflix titles by language, but they absolutely refuse to do it (I assume because allowing users to filter content would expose how bare the offerings are).
Netflix, and other streaming is absolutely the worst at stuff like this.
Another thing is Subtitles in every language. They ONLY show subs in a handful of languages, even though the subs are in every language. For instance, I live in Norway, it's common to see subs in only Norwegian, which makes sense. But imagine you're a tourist/immigrant, etc. Maybe you want to watch this Japanese movie, well, now the audio is in Japanese, and the Subs are in Norwegian.
The app knows your language preference... but shows the subs for the country you're in. Even though Netflix/etc has the rights to the streaming.
It's baffling to me, and I must be missing a piece of the puzzle. But I'm forced as someone who's still learning Norwegian, to skip all Non-English media, OR pirate them so that I can get subs in whatever language I choose. (Yet another example of how piracy is the better UX)