Emails Does Not Work Properly for each Language

I was setted several email templates for each languages (Italian, English and Spanish) and when I tested firs time I setted them they were working but when I got an email from my Italian customer then I’ve realize that the email sent in English one but it should be Italian.
So I checked Italian mail template and there should be “language” and “country” option as default email options has (order proccessing, order completed etc).
So I think there have a bug or something weird.
So please help me about it.
Thnx