"Hablando se entiende la gente"
Es una frase de mi libro de texto Una Vez Más.
Creo que no es literalmente "People understand speaking..."
That's a great saying, the translation is that "the best way to understand one another is by talking to each other'. (Communication is key) I wish I could think of an exact saying in English but I can't.
Margaret is correct as usual. The closest direct translation would be, "By speaking, people understand."
La Academia Norteamericana de La Lengua Española dice que la traducción es algo como:
"Speaking Well Makes the World Go 'Round"