In my own case, my Mom was INFJ, and I grew up with simple rules such as "If you can't say anything nice, don't say anything at all," along with more formal rules of politeness. She is also responsible for my generally good grammar. When I was 8, she was correcting me with respect to the subjective tense: "You say, 'If I were there,' not 'If I was there.'" As a result, the kids at school thought my speech patterns were odd.
Grammar or behavior ... the lessons we learn when we are young stay with us throughout our lives. I suspect that type only affects how we store such lessons in our minds.