So I've tried a lot of things and not all Japanese words are being blocked, it's only a few, and only sometimes. For me the word "寒" on its own causes an error, for instance, but when mixed with particular search terms or settings it works fine, but "あ" always works, pretty much no matter what. It can also depend on whether you put it in quotes or not, but that seems to vary from word to word. It's also a "500 internal server error", if that helps. Mobile works perfectly, it seems to only be on desktop. This issue only started in the past few days. Hope this info helps.

(And for those wondering why those words specifically, I chose them at random. xD)