Since I am in germany and I usually curse in other languages than german.
Preferrably italian, english, french and our regional dialect.
I curse way too often, beauce you might think, that no one really understands what you're grumbling, or likewise, shouting.
But you just might...
Especially in a country where amlost everyone speaks/understands english, many know some french and I used to be engaged to an italian lady.

Friggin...
;-)