The funny thing is I had a great grand aunt whom everyone called "Fanny" (this was obviously in the US) which even just knowing the US meaning I thought was...odd. (She had passed long before I was born.)Noah Webster's concept of spelling words phonetically (ironically not fonetically) in the USA falls apart by the fact there is one US State called Kansas and another called Arkansas yet the latter is pronounced by Americans as Ahr-can-saw rather than ahr-can-zas as it would be if the phonetic rule made sense and was applied uniformly, that's before we touch on Connecticut and Tucson havng a silent "c" and the "s" not being vocalized in Illinois... just saying.
Mind you, when I was a kid, all of my mates used to crack up laughing when the TV sitcom The Nanny would start and the jingle said "Til her boyfriend kicked her out in one of those crushing scenes, What was she to do, Where was she to go, She was out on her fanny..." because outside the USA, "fanny" refers to a different part of a woman's body than it does in the USA. Search the internet for the worldly meaning and imagine what 10 year boys thought hearing that in prime time TV every night hahahaha.
As for Arkansas/Kansas, I am informed that people in Kansas do pronounce it "Are-Kansas" not "Are can saw." Including the Arkansas river, from which the state got its name, which flows from Colorado (where it's "Are can saw") through Kansas ("Are Kansas"), Oklahoma (no idea what they do there) and then into Arkansas where it's the "Are can saw" once again.