phony accent

Translations
поддельный акцент
He spoke with a phony accent to impress them.
Он говорил с поддельным акцентом, чтобы впечатлить их.
Definitions
A phony accent is an artificial or insincere way of speaking that mimics the speech patterns, intonations, or pronunciations of a particular region or group, often used to deceive or impress others.
Words
accent

noun
акцент
phony

adjective
фальшивый