Not very good guesses. It had me read twice and I used a high quality mic. It guessed Spanish as my native language, but picked up a bit of Chinese and a bit of English. I am a native born American whose only language is English and a life long Midwesterner. I have a midwestern accent and occasionally some Canadian influences sneaks in (or so people have told me), but Spanish/Chinese? Completely wrong.
As a non-native speaker, it is very very accurate even for Hungarian, which is quite a tiny language. I have sent it to several friends and it "caught" them all.