All of them
Well, usually in my native great and mighty Russian language lol (I am not bilingual or anything). Sometimes I casually use "fcking fck" from English, but not when something crucial or unexpectedly bad happened, more like in surprise. Sometimes 草泥马 is better than the thousand words, especially when I don't want people around to understand I am swearing? I guess I use it when I am annoyed by something.
So when I hit my toe against the leg of the stool, I will definitely shout in Russian, when the computer is frozen I'll say "fcking fck" and in the crowded bus I'll maybe say "Ai, wo cao" (sorry, no pinyin on my computer).