I don't know anything about development, so I didn't understand your answer.
In my first post, I was just thinking of replacing the letters XYZ in the dialog box with the letters UVW wherever necessary.
That's all. It seems logical to me.
Especially as in the UVW XForm operator, it's clearly noted U Fixed Tile, V Fixed Tile, etc.... and not X Fixed Tile, Y Fixed Tile, etc...
It just seemed like a silly thing to correct.