I'm going to fake an accent at my job
Why would you fake an accent?
Because I hear that people are much nicer when I talk in foreign languages.
I don't really think that that is the case. Besides it is not okay to pretend to have an accent if that is not how you actually talk.
But I want people to be nice to me. So I'm just going to pretend to be someone else.
People will be nice to you if you just be yourself, don't worry.