Through common usage, we will finally come to the "correct" spelling. Somehow we now have a standard spelling of sgian dubh. That wasn't true just a few short years ago.

Usage determines spelling.

It may well develop that we will have things something like this:

Argyle = Jacket and hose
Argyll = the town

As kilting, really isn't in the main stream yet, the linguists haven't paid it much mind. I have three hardback paper dictionaries in my place, and different publishing dates. All have wide variants on spelling as relates to the kilt.

As we wean ourselves away from the paper dictionary and towards the web, (which by usage, is more standardized) our relatively small numbers will be able to exert greater influence.

Look what we did with the box pleated kilt!