I actually learned something today. I had always chalked up the Viking invasions to "more of the same" after the Anglo-Saxons had settled, but you're of course

I actually learned something today. I had always chalked up the Viking invasions to "more of the same" after the Anglo-Saxons had settled, but you're of course right that the two (well, three, I guess) groups came from different geographical areas and the Vikings would of course have spoken a distinctly different language. I guess I conflated the common view that English is originally a Germanic language with French influences with "English is Anglo-Saxon plus French over time".