I have unpacked MacBookAir 13". How to check using serial number or other information from the box if MacBook is equipped with English keyboard layout or with other?
I've compared two MBA boxes one labeled as IEA/DNK and one labeled as DNK/DNK. The first one was with International English (or if you are Polish this is Polish Pro for you) the second one was Danish layout (they have no programmer layout).
So it looks like the first 3 letters are keyboard layout and 3 letters after slash are country code.