I was born in Germany, and then I moved to America when I was around 10 years old. I became fluent in English within a year of moving here. I had no idea I had a German accent until one day, when I asked my reading class in middle school out of nowhere if they thought I had an accent, and I got a resounding "YES!" I knew, back then and now, that I couldn't pronounce certain things like the "TH" sound in words... Mother, father, weather etc, or that weird American "ORL".. World, hurled, whirl. I still didn't think I had an accent at all times, though. Guess I was wrong! Nowadays, I get told all the time that I don't have a German accent anymore. I still slip up sometimes, but my spoken English is pretty much perfect.