It is apperently only valid for the English version. But you could use the English version in Spain, too, if you want, and thus take advantage of the deal.
It's not as cheap as you think, because it is in English pounds, say about 29-30 Euro.
If you look for a special offer on the Internet in Spain, i think you can get it for the same price as this offer, i think. Select a reputable shop!!
Keys for Norton are valid across language versions.
So if you get the key seperately when you download, you can install or simply renew/subscribe (at the bottom of the Norton screen) of the Spanish version with that.
Otherwise, if you need to install the English version first to see your key in your Norton account, you then can uninstall and reinstall the Spanish version again.
Thanks. I forgot to add that there is a promotional code: AE20NIS, so with this promotional code and removing norton download insurance the price will now be £10.99, about 12-13 €. It seems a bargain for me!
Please make sure that it is from a reputable store or online site. There have been many people who have got burned when buying from the wrong places and then find out their keys are no good because they had been used before. Thanks.