I have found that the ability to speak German without an accent has aided me in pronouncing (How _does_ one spell that word emoticon!) words in other languages.

I've had similar experiences with multiple languages. I am not a native Spanish speaker, but have studied it for many years and lived in a number of hispanophone countries. After spending some time while in college studying in Spain, I then went on to study in Italy (ah, I miss those days...). Throughout my time in Italy, I spoke Italian, sounded like a Spaniard due to my accent, and (with long blond hair at the time) looked more like a German. Nobody could figure me out, which was great fun.