[barking]

>How do you know it was violent?

I don't but most peoples, like most animals are territorial and resist the movement of others into their territory.

Your language theory is interesting. But then the english language as spoken in many areas where it would be the language of the non-peaceful invader inherits from the local language. And getting on for half the words in the english language itself were adopted from the French language of the Normans invaders.