Ok, strictly yankee refers only to the northern people, but it uses commonly to refer to all people which were borned in USA, isn't it?. At least in rest of the world. I don't think that there be many confederates.
You can see that I didn't write 'gringo' in my post, so I don't know the reason you asked me about ethnic names. I think that 'yankee' isn't a nasty ethnic name...
A translator, mmmmm ... So.. didn't you understand my post???
Arggghh, I took so long.. Anyway, you should find another one
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Bye,