Its because she is from like 3 different places or some shit and they all got intertwined. her shit is all fucked up
T'kor explains during the Season 26 premiere that her accent is an unusual mix between what you might hear in England, Chicago, and even Atlanta. In fact, she claims three hometowns — London, U.K., Chicago, Ill., and Atlanta, Ga. Because she grew up in different places with so many different accents, T'kor's accent is a combination of them that is more noticeable when she gets excited or, in the case of Angela, frustrated.
She explains in her preseason interview that she grew up in a "low income household in the South Side of Chicago, raised by two lesbian mothers." She also spent time in London and, later, Atlanta. As a result, T'kor's accent is sort of hard to place. And sometimes, it doesn't come out very strong. Or, at least, parts of the accent are stronger than others. So when T'kor's accent does sound more prominent, it's a bit of a shock.