Features Of Rom That Differ From Original?

Aug 10, 2014
I've been away from the ROM scene for awhile, I've done a lot of searching for features of the current MIUI 7 roms but I can't seem to figure out what features that are maybe added aside from the original from Xaiomi?
Reason I ask is because I just received a MI4W and I happen to live in the US. I noticed there is no locale for the US or the UK.
TLDR: Mainly I just want to know if the ROM hosted here has these locales (US or UK) added by chance?

If there are any other features of the ROM hosted here that differ it would be nice to know as well :)