Well let's see, aside from Aurebesh there's
Protobesh (created for the Jedi Sacred Texts props IIRC),
Domabesh &
Dishabesh (both made for 'Rogue One', mostly seen on Jedha), which are all basically just stylistic variations on Aurebesh. There's also a couple different variations used at Galaxy's Edge IIRC; one for the droid shop, and I think another for various signage, plus a roman alphabet version done in a similar style.
The "
Old Tongue" script (based on
a Ralph McQuarrie painting comisioned for an art book in the mid-90's) shows up on basically anything ancient; from Sith Temples, to Jedi and Nightsister ruins, and most recently: old pirate hideouts.
Speaking of Nightsisters: 'Ahsoka' introduced a new
Dathmiri script that
muggins spent a lot of time decoding a few years back.
The prequels gave us two separate Naboo alphabets;
Futhark (seen most prominently on the N-1s) and
Futhork (used for the computer displays), two for Tatooine: an
Outer Rim alphabet, and a
Huttese alphabet. Plus
an alphabet specific to the Trade Federation. There's also a Mando script that showed up on Slave I's displays that which I think may have actually been fan made, or at the very least and EU thing, and has since shown up in TCW and I think 'Rebels' too.
The one made specifically for 'Andor' is called
Bazeese, and it's what's used on the funerary bricks.
As for whether they always mean anything or are just gibberish; that seems to mostly depend on the respective art directors/set decorators/costume designers/prop masters etc. etc.
In the OT, it being the pre-digital printing era, such things were mostly done by altering/mix-matching characters from rub-on letterhead transfer sheets (the only way to get fancy fonts back then), with little care taken to establish a coherent cipher, let alone bothering to write any meaning into it (and indeed, why would they?) These days, with things being done digitally, the most efficient way of doing such things is by making a custom font, that pretty much does the cipher part of the job by default, so more often than not it does indeed have a meaning . . .
though not always an entirely coherent one . . .
Basically; just remember to always take it with a pinch of salt. And if you want to dig a little deeper,
Aurekfonts has some pretty good resources.
www.theguardian.com
www.businessinsider.com
