Simple reasoning.

They say what they hear, and curses aren’t a huge deal in other places. It also may have been translated.

Words that ARE considered curses (or when they are used as such) are processed by a different part of the brain than regular language, they are handled by the warning/alarm-cry circuitry. So there IS something particular and distinct about them.

I agree.

@sir_spiderman I didn't intent to imply that you had, I just wanted to show that they have a certain significance.