She told me that you were talking with her used Italian.are you sure? But I dont know where is she from ^-^ I think she is not realy Italian and also not native’s english.

彼女はあなたがイタリア語で彼女に話し掛けてきたって言ってたけど本当？でも私は彼女がどこの出身か知らないわ。私は彼女が本当のイタリア人やネイティブの英語を使う人じゃないと思う。

他に良い言い方教えて下さい。変な文を適切にしてください。

She told me that you talked to her in Italan, is that true? But I don’t know where is she from. I think she is not real Itailan niether British.
　

But I dont know where is she from じゃなくて
But I don’t know where she’s fromじゃないんですか？上の文だと疑問形になると思うんですが。 　

英語のネイティブスピーカー＝British ではないような。

She told me that you spoke to her in Italian. Is that true? I’m not sure where she is from but I don’t think she is an Italian or a native speaker of English.

間違ってたら直して！ 　

native English
だったら、英国の先住民＝アングロ・サクソン

native English speaker
だったら、英語が母国語
　

She told me that you had talked to her in Italian, is that true? But I don’t know where she is from. I don’t think she is either original Italian or a native English speaker.