you can't speak spanish

If you can't speak Spanish, do not speak at all.
Si no puedes hablar español... no digas nada.
Or maybe you can't speak Spanish, but I assure you, it does say "private."
O quizá no hablen español, pero les aseguro de que dice "Privado".
Or maybe you can't speak Spanish.
O a lo mejor no hablan español.
It's hard to understand salsa songs when you can't speak Spanish.
Es difícil entender las canciones de salsa cuando no sabes español.
Palabra del día
el inframundo