The same attitude was shown by humans towards other humans a thousand years ago. If they couldn't understand the language of another tribe, they considered that

The same attitude was shown by humans towards other humans a thousand years ago. If they couldn't understand the language of another tribe, they considered that tribe inferior and called them names signifying that. The ancient Greeks called non-Greek-speaking peoples "barbarians", suggesting they are uncivilised, primitive. To this day, the name of Germany in Polish means "those-who-cannot-speak".