I think it's possible that the raw was in Spanish because it's a lot more common to refer in Spanish speaking countries (or at least in mine) to the Netherlands as Holanda or Holland as it was stated here more than "Países bajos" which would be the translation of Netherlands.
Actually it's really confusing to see under which circumstances Holland would be used, so yeah it is a country but it's complicated
so here https://en.wikipedia.org/wiki/Holland
oh you mean Amsterdam
there isn't a country called Holland, right?
http://www.mangago.me/read-manga/henshin_dekinai/an/henshin-dekinai-chapter-5.html/13/