Japanese is also great. While there are general rules when you use hiragana vs. katakana, sometimes for stylistic reasons the "wrong" one is used, or some kanji is "spelled out" as hiragana, and depending on context, you might or might not want to include these in your search results.

Tbh I just stopped caring and now happily live in my little world where utf8 is the solution to everything, doesn't yield any problems ever, and anyone telling me differently gets completely ignored.