Headcanon: Not only does Kongou still speak English, when she's drunk she has an incredibly broad Cumbrian accent as she reverts to the dialect of the land of her birth.
"Aye an' oon maer thing I'll tell thee, I've ad enow o' gooin oot afar yon bluidy fesh, I'll tell thee tha f' nowt. I'm a waarship no' a bluidy feshwaif."