Do you feel similarly about french and english? It could work but would be a little weird and annoyong to switch language modes
I think you underestimate the similarities. For instance Japanese names are not translated to Chinese. Theyre just read with Chinese pronunciations. So Chinese will regularly interact with Japanese content (im guess it happens the other way around too, but i dont have the personal experience)
>Do you feel similarly about french and english?
Yes. If you search gâteau it shouldn't show results for cake by default.
>Japanese names are not translated to Chinese
Then it makes sense to search for the names in Japanese. Either they are translated to Chinese so you should be able to search with Chinese, or they aren't and you should search with Japanese.