아이씨 (Aish) Korean - translates loosely to 'damn' I use it all the time without meaning to
아이고 (Aigoo) Korean - used to express frustration I also use this all the time
เชี่ย (Shia) Thai - Like damn or shit. It slips out a lot
可愛い (Kawaii) Japanese - Cute. I actually use a lot of Japanese here and there because I've learned it for a few years but I use this the most I think
Honestly I have so many random words in all different languages that I've picked up and I use these are just the ones I use most often, lol