Multi-lingual search results in general; Google (and FB) just for some reason cannot comprehend that someone might have reasons to search in multiple languages or even regions. For instance, I at one point was an editor/fact-checker for an academic publisher and one project involved checking a lot of information from official government sources around the world, and Google did not know what to do with that.
Hell, I'd love to have the option to make the search results be completely language agnostic.
Don't you just set the region and language at the bottom?
I also search in multiple languages but I also know that's an exception. The majority of the people in the world likely would only use a single language and it's easy to believe that search results are better for those users with languages separated.
Yes, hence why I'd want an option for language agnostic results. It would be a terrible default.
There are cases when I'd even like REGION agnostic results, or least ones not bound by national boundaries. For example, I have an interest in my state history (MI), and there's plenty of relevant articles/commentary from the Canadians.
I don't think it's too niche, I think they're just American.
A Canadian/Indian/EU-based Google probably would've ended up with multi-lingual support, whereas a China/UK based one probably wouldn't have.
By the time Google got big enough for international considerations, there were already a bunch of baked in assumptions about their users, like them being monolingual.
Hell, I'd love to have the option to make the search results be completely language agnostic.