Dear Jim, it is i alone, who doesn't much to offer on this topic.
Concerning the actual difference in nomenclature between 'arabesque' and 'jibberish' ...
I have used arabesque (from the Italian ((also Portuguese))arabesco) as the term i had at hand, as intendedly meaning a decoration detail rather than pure arabic caligraphy. I wouldn't use the term jibberish (propper gibberish) as i gather that this is perhaps more indicative of 'speaking' rapidly and inarticulately, and not 'writing' in such mode. But when i quoted your mentioning the jibberish term, my intention was to attest that we were both meaning the same thing.
But speaking of fine tunings, allow me to remind (in double) the intrinsic distinction between recazzo and forte, such as not underlined in Peter's drawing link.
While the forte defines a determined area (section) of the blade, as in principle its strongest part, the recazo, while circumstantially associated with a inherent location, is a term that refers an added value created in a blade, being a blunt (non edged) zone in which you can grip the blade with your fingers, to better (wrist) handle the sword, acquiring a wider angle for sword combat. So we have that, while blades could/should 'always' include a forte, the recazo is not necessarily a 'ever present' part of the blade, this having being a later 'invention', i guess during the XVI century; according to some, a resource more practicable in Western terms, being more of an esthetical detail in the Orient, when it exists.
Perhaps you knew all this; sorry for the bore.
Take care
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