"She said thanks for the food."
Translation:Hon tackade för maten.
Is the correct way of saying "thanks for (something)" to someone always "tack för"?
so she thanked (no one particular) for the food? You don't need to say "tackada oss" or whatever ? Is that even on option?
Yes, if you want to be specific you could say "Hon tackade oss för maten" or so. Since the food is in the definite here, it's most likely she said this after a meal of some sort.
I've noticed it's very common for people to say "tack for maten" at the end of a meal, so this sentence sounds like an observation that she had done so.