When Barney is first handed the final menu for his wedding, Barney alternates holding his menu between landscape and portrait. This is further highlighted by the shots where the menu is visible: Barney, reading, moves his finger horizontally across the vertical words.
Among the difficulties of moving to Italy, Lily mentions that they don't speak the language. But in the episode "The Possimpible", when Lily updates her professional resume, under "Special skills and interests" it says that she is fluent in Italian.