Pitt: Polly, how are you doing?
Polly: Good, yourself?
Pitt: Fine. I have a question to you.
Polly: What is it?
Pitt: You speak Italian, right?
Polly: I do. However, I haven't used it for a while.
Pitt: Do you know what is the correct form: panino or panini?
Polly: hahah, both are correct, just panino is singular and panini plural, sandwich and sandwiches.
Pitt: oh, thanks, good that you're such a linguistic genius.
Polly: ahaha, I'm glad I could help.
According to Polly, in Italian panini is plural from panino.