My solution for good interaction, since I'm fluent, is to state to the person i'm talking to, is right up front and say; I'm not a native, so forgive me if I so

My solution for good interaction, since I'm fluent, is to state to the person i'm talking to, is right up front and say; I'm not a native, so forgive me if I sound informal. Usually that's enough for the person to be forgiving, and possibly impressed, sometimes I just get a confused or rude look.