Paese che vai, usanza che trovi.

　　English translation: The country you visit, the customs you find.

　　Idiomatic meaning: When in Rome, do as the Romans do.

　　Pane al pane, vino al vino.

　　English translation: To call bread bread and wine wine.

　　Idiomatic meaning:To call a spade a spade.

　　Patti chiari, amicizia lunga.

　　English translation: Clear agreements make for good friends.