their accent / his accent / her accent
I couldn't understand his accent.
I love her accent.
Her accent is perfect.
A juzgar por su acento, es de Kansai.
Judging by his accent, he's from Kansai.
Tom perdió su acento extranjero.
Tom lost his foreign accent.
No puedo identificar del todo su acento.
I can’t quite identify their accent.
Su acento da a suponer que él es un extranjero.
His accent suggests that he is a foreigner.