Right now, that would be @UnitRico, @Dreagon, and me. If you only want to count people who are %100 Dutch, @battleearl wouldn't even count, 'cause his parents are of Chinese origin.
It's still not the same (jk)... Meh. I guess it's either a special language, or a very strong dialect. It's going to fade away within the next decades anyway, so...
It survived for this long, I doubt that you'll get rid of it (unless you make all the Frisians "disappear").
So that makes you 1/8th Swedish, I guess...then again, if you'd go back far enough, well...actually, I don't know where you'd end up, probably Africa.
Well, your location says Argentina, so I think first of all Spanish, and down the line maybe Roman or Greek or something.