Uuuh, what a mess, should have had its own thread now...
Most dont call it kiteboarding, but kitesurfing for one, just like windsurfing just with a kite - whether you are a wave windsurfer or a wave kitesurfer or a wave kitefoiler is the way to distinguish whether you are specifically going for waves or not.
Kiteboarder is not a known name in many countries either, but kitesurfing is the most used I think.
Just checked, googling you get 2-3 times more hits with kitesurfing, than kiteboarding, that is a quick but very reliable way to find out which is used the most
Not what is correct no, but as different in different languages it makes sense.
A hydrofoil is almost a perfect glider in so many ways, only difference is the way we control pitch which is dampened because of the mast/strut, and not relying on speed changes the same way as gliders regarding self correcting stability.
A wing and fuselage and rear stab as a whole, is by many, also the French, called "A Flyer" - which makes sense, as in itself a really good glider
Whether you are sailing or flying or riding a hydrofoil, we understand all terms very well no matter if some are not technically correct, but used, right?
Some terms I definitely dont like either, agree fully with you RH that it is wrong, like calling a 12 m2 kite a 12 meter kite, makes no sense and totally incorrect.
BUT, we all understand what is meant, it is sizing and not span nor linelength, so as most are using "12 m" there is no reason to chime in at every chance it is wrong - it is the used norm, live with it, I do.