have a twang in (someone's) voice

Translations
говорить с характерным акцентом
He has a twang in his voice that makes it clear he's from the South.
У него в голосе есть акцент, который ясно дает понять, что он с Юга.
Definitions
To have a noticeable accent or distinctive nasal quality in one's voice, often associated with a particular region or dialect.