Research from postdoc Lacey Wade confirmed this idea, what she calls expectation-driven convergence, in a controlled experiment for the first time. The work reveals just how much the subconscious factors into the way people speak.
Humans 'subconsciously mimic other accents', psychologists claim
Accented Speech Harder to Hear, Harder to Remember
A Link Between Hearing Voices and Hearing Your Own Voice - The New York Times
Communications
What makes us subconsciously mimic the accents of others in conversation
OC] I'm making a virtual dialect coach for D&D players! What voices do you want to practice? : r/DnD
How to Imitate a Texan Accent: 12 Steps (with Pictures) - wikiHow
What makes us subconsciously mimic the accents of others in conversation
The Full Guide To Understanding Accents in good manners