The English and the Celts - no genocide?

[Aryaman2]

Actually, no, Robert. That is precisely the point Coates makes.
The same one Aryaman made. And as a Linguistic proffesor, you'd
think Coates would know. Linguistic borrowing only takes place by a
conqueror when there is some prestige to be gained by the
conqueror. Franks admired Roman culture - even Romano-Gauls, and
saw them as strong people to be emulated. Obviously, Anglo-Saxons
didn't think much of Britons.

I disagree, Coates points to enslavement, expulsion and genocide as probable answers, my reply was that social considerations could be enough to explain it.