If this is the language pack in its entirety, it should probably be removed. These "Easter eggs" are funny while they last, but at some point, the party has to be over and Mojang has to maintain professionalism.
Why does everyone insist that US English should be the norm, anyway? The game wasn't even made in the US.
Oh! Or how about we go to good ol' Wikipedia! (Skookum!)
By reading that Wikipedia page, I learned that a lot of things I hear every day are unique to my dialect. Neat.
For the record...Canadian English is not a dialect of English. It is almost exactly the same as US English, or any other kind of English, except for a few barely noticeable differences. So obviously, these differences are exaggerated, like adding "eh?" to the end of phrases in Canadian English, and if they wanted to have some fun with the upcoming addition of Australian English, they could add "mate" to the end of everything. Otherwise, having Canadian English, or any other kind of English, would be pointless.