As bad as the American reputation for pronouncing foreign words, it's definitely surpassed here in Spain. If you come here from the US, you need to re-learn your English pronunciation in order for people to know what the hell you are talking about.
My favorite experience so far is asking in a pharmacy for Vics Vapor Rub. No one seemed familiar with it, so I described what it is, and all of a sudden a light went on.
"Ah! beeks bapor rue! beeks bapor rue!"
It's quite well known here apparently. But you have to pronounce it as if it was a Spanish word.