@Dinosforall
As pp said, it's code-switching. A lot of people on this thread seem to think they're immune to it, I know I'm not
No, I'm not either (but having lived longterm in different countries, it tends to be more that my accent tends more to being slightly English if I'm speaking to an English person (for example), or my accent in French varies regionally depending on circumstances -- and I certainly hear myself doing it, though it's seldom a conscious decision, except if it's a comprehension issue).
But then I'm also perfectly aware I have an accent, because everyone has one -- an alarming number of people, however, appear to think they speak in some neutral, accentless mode.
Virtually everyone code-switches, either between languages or types of language kids who speak 'street' and then standard English to their parents, or English with their friends and Punjabi at home, or people who put on a 'phone voice' or my SIL has a special 'posh voice' she only uses for waiters, for some reason.
@Bluntness100, if it weren't for the fact that our old cleaner retired some time ago, I would think we'd had the same woman. Impressive, efficient and fundamentally disapproving.