In italy we have "stronzo" with the same meaning, and strunz is actually the form for some regional dialects.i've gotten used to how much mangaka like using ridiculously long names in my language but I just can't get over the fact that protags country is named STRUNZ!! What kind of empire is named fucking Strunz xD
Which, fun fact, is an actual last name in Germany and might stem from Old High German, where it prob meant dung. So she's princess of the shit empire