An acquaintance who I knew in highschool has since transitioned. Before publicly identifying as a woman she had a relatively neutral British accent with a some with a slight hint of Scottish. Since transitioning she has a full on lilting highland accent. Which i found odd. I have a similar accent to her original accent and decided to try doing a girl voice to see what it would sound like. And i too developed a strong Highland accent. Why? I was specifically trying not to.
Voice training (specifically vocal weight) literally requires changing the shape of vowels to achieve a more masculine/feminine tone. It’s understandable that a perceived change in accent might arise from that change in pronunciation.
It could also be the result of the example they are targeting in voice training. Maybe the woman they want to emulate is Scottish, so she naturally took on her accent too. Our brains literally learn language by emulating other speakers close to us, which is why accents are regional to begin with.
Possibly you’re over-enunciating? I’m from the south of England originally and usually talk with a fairly international blend, but when I started voice training my accent turned very plummy.
You could try impersonating someone in particular: repeat lines from a move or game, even. Or try a totally different accent. Valley girl is fun :)
Yeah I can sort of do Edinburgh, Belfast, Larne or other regional accents, but I definitely don’t sound like that normally.
I found that I could go back to my normal accent once I got used to doing girl voice. It’s probably something to do with habit and muscle memory, but who knows.