Yoot' Gangsters!!

[xoggoth]

It has to come naturally and Sarf Lunnun has quite a lot in common with oz.

[OwlHoot]

That's what psychologists call acceptance behaviour mirroring (or something like that)
Basically you make yourself sound similar to them to make them like you

They say you're supposed to do that in interviews, to establish a rapport.

But what if the interviewer has a twitch, or stutters? It would be like a Two Ronnies sketch.