Wanderwörter is a German word that describes the borrowing or adoption of words by travelers moving from one geographic location to another, often along trade routes. As an example, the popular beverage Coke is derived from the Spanish word coca. That word is derived from the local name of a South American plant, kuka. That word hitchhiked with the Spaniards as they traveled to and from South America. Check out this map of some familiar words and their origins here.