I get Scandinavian DNA, but where does Spanish DNA come from?

So, I consider myself to be of Norwegian-American descent and culture. I mean, my dad has raised me talking about not only Old Norse Viking stuff because he's nerdy like that (affectionately) but Norwegian stuff as a whole and language videos on it. I am actively learning Norwegian on-and-off.

I understand having a lot of Swedish when I take a look at my DNA due to my dad saying that Scandinavians impregnated everywhere. I understand that I had some distant relatives from London and apparently a lot of English people have at least 25% Scandinavian DNA, but IDK if it's true and I don't consider myself English. It's not my culture, really, nor is being English-American or anything.

However, I get some Spanish that pops up (like from Spain) and I have no idea where it comes from or how/if it relates to being Scandinavian.