I agree with your language parenthetical, but speaking for myself at least, my elective language course did not have this effect on me (at least that I noticed)

I agree with your language parenthetical, but speaking for myself at least, my elective language course did not have this effect on me (at least that I noticed). It was actually traveling to a different country (In my case, the UK in high school, then China in college) which opened my eyes to all the assumptions I didn't even know I had.