Comment by antonvs

Old English is not considered to have evolved from a Nordic language.

Old Norse was a North Germanic language. Old English was a West Germanic language. They were mutually intelligible to a significant degree, since both were Germanic languages that evolved from the hypothetical common ancestor Proto-Germanic, but saying Old English was "90% a Nordic language" is like saying that humans are 90% chimpanzees. Both evolved from a common ancestor, one did not evolve from the other.