Post here all non technical related topics about Formula One. This includes race results, discussions, testing analysis etc. TV coverage and other personal questions should be in Off topic chat.
A person can "lose" original nationality if it renounces that nationality but I don't think that MS has done that. If a person renounces nationality before acquiring nationality of some other country than such person is called apatrid (person with no nationality). Third option is having dual nationality which many athletes have especially if they origin from poor countries.
If Michael had renounced his German origins and taken up Italian citizenship then I'm sure he would have told the media. Sure it would create a fuss...but its MS, he wouldn't want to but again, he's not going to like to hear the German national anthem playing if he now considers himself italian! He couldn't stand that. He's quite an honourable guy...ruethless on the track maybe, but outside an honourable guy. My friends uncle works for a company who deals with Michael...he has met him 3 or 4 times and says he's a little arrogant, but a trustworthy and polite appearing person.
Silence is golden when you don't know a good answer.