"저는 친구 집에서 설거지해."

Translation: I do the dishes at my friend's house.

[MelaPaula]

As far as I know 저(I) isn't/cannot be used in a this kind of sentences where there is no honorifics. Instead 나 should be used. Am I right?

[wintertriangles]

You're right as far as I know. It's a foreigner mistake. I should know since I used to do that.

[Renee169426]

It really has to do with honorific phrasing. 나 is just a little less respectful even though you are talking about yourself.