by their accent
Sé por su acento que él no es estadounidense.
I know from his accent that he's not American.
Reconocí por su acento que era americano.
I recognized from his accent that he was American.
Por su acento sé que es alemán.
I know he's German from his accent.
Por su acento, supongo que ese hombre es escocés.
Judging by his accent, I'm guessing that man is Scottish.
Los demás niños en la escuela se burlaron de él por su acento extraño.
The other children at school made fun of him for his strange accent.
Entendí por su acento que era estadounidense.
I understood from his accent that he was American.
Por su acento, ella cree que es ruso.
Because of his accent, she thinks he's Russian.