accentless
adj. B2 Upper Intermediate ac·cent·less
adj. having no strong regional or foreign accent. You use this to describe someone who speaks a language in a way that sounds neutral or standard.
adj. lacking a distinct regional, social, or foreign accent. Often used to describe a neutral or standard pronunciation of a language.
She has an accentless voice that is easy to understand.
The news anchor is known for her accentless delivery, which helps the broadcast reach a global audience.
While he was born in London, his accentless English suggested years of formal training in a neutral British style to avoid regional bias.
From accent + -less.