Here a list of German words, which were used in the English (mainly American) language:
http://www.englisch-hilfen.de/words/lehnwoerter.htm

It's quite interesting, what German words were used in other languages, too. I just have found while surfing the www about this theme some more examples. I try to find examples for Spanish words, which were getting common over here (because CCF had started the topic
Ah, here it is:
http://de.wikipedia.org/wiki/Liste_von_Hispanismen