i do think that a severely under-talked about idea between Jason and Damian within the whole league-brothers AUs is the communication factor. like, if we go with the idea of Jason basically being a catatonic zombie who has to relearn how to be human after his pit-dunk, and with him meeting Damian when Damian was like. barely out of a diaper. the communication between those two as they got closer would be fascinating.
like, aren't there psychological studies claiming that twins are more likely to have delays in language development because they become so in tune with each other that they don't need to learn how to speak as quickly? can you imagine that with Damian and Jason. Jason whose communication development was put back to square one after the pit, and Damian who was only just starting to get the hang of it anyway. those two become close and suddenly they're learning how to communicate together--and it causes fucking chaos within the league.
i want them to be able to communicate fluently with each other before anybody else can understand a single word they're saying. they have their own weird half-grunt-half-gesture-half-body-language thing going on and i bet you the rest of the league is so tired of having to deal with this bullshit.
Jason is still like. actively being used as one of Talia's top assassins/guards, is the thing. somehow despite the fact that fucking verbal language is escaping his post-lazarus mind, he's still a beast with a sword. or a gun. or anything, really, to the point where Ra's is specifically requesting Jason as a personal guard during particularly risky situations. so like. they kind of need to be able to talk to him. it gives Talia a migraine every. time.
Talia: Jason. you are needed.
Jason, intently watching three year old Damian draw in the sand with a stick: *looks up at her cluelessly*
Talia:
Talia, internally sighing: Jason. you have to *gestures* come.
Damian: *glances up and blinks*
Talia, speaking slowly and clearly: Damian, tell Jason that he has g-u-a-r-d d-u-t-y. understand? g-u-a-r-d.
Damian: *looks at Jason*
Jason: *looks back*
Talia, under her breath: finally,
Damian: *jerks shoulder and clicks tongue*
Jason: *grunts back and stands up*
Talia: yes, now lets-
Jason: *hands Talia his sword and sits back down*
Talia:
Talia: what.
Damian: you want sword.
Talia: NO!?
~
Ra's: grandson, how are your lessons going?
Damian: *wiggles his fingers and whines slightly*
Ra's:
Jason, in the corner: *claps his hands, congratulatory*
Damian: *preens*
Ra's:
Damian's tutor: ...he is doing well.
Ra's: *sighs*
I think even after they both learn how to speak normally they still have their weird little baby-twin language. it's like their mother tongue, what they default to whenever they aren't paying attention. whenever Jason gets genuinely pissed off he starts speaking in this weird mix of grunts and clicks and Damian's the only person that understands. after Jason's assigned his own team of subordinates at the league it becomes a regular occurrence that one of the guys will barge into the room while Damian's training and demand that he go with them. Damian has to stop mid-kata and follow some random assassin into Jason's meeting room because he's been yelling at his squad for the better part of an hour and they can't for the life of them figure out what they did wrong. Damian walks in, listens to the incomprehensible mix of jerks and noises for four seconds, states plainly 'he found out one of you fell in a koi pond during a stealth mission and killed three fish.' and then leaves instantly.
it keeps happening, too. even in Gotham, the language just never stops being an instinctual fall-back for the two. if Damian is woken up while half asleep by Tim or Dick, for the first two minutes or so he will be completely incomprehensible because his brain hasn't kicked into gear and he's speaking the language that comes most naturally to him. there's an occasion where Damian forgets the English word for some inane thing while talking to Tim and he just. cannot fucking remember what it's called. ends up instinctively reverting back to what it would have been if he were talking to Jason which is a weird hum/grunt, and Tim looks at him like he's insane. Damian can NOT remember this word in English, and Tim can NOT understand what Damian's saying and it's driving them crazy. they're still arguing about it on patrol three days later when Red Hood comes across them and he hears
Tim: -I DON'T KNOW WHAT THE FUCK THAT MEANS!
Damian: that's not my problem!! i'm speaking very clearly!!
Tim: THAT'S NOT A WORD.
Damian: YES IT IS.
Dick: how are you two still on this???
Damian: IT'S A *grunt-hum*. I CANNOT SAY IT ANY PLAINER.
Tim: WHAT THE FUCK.
Jason: *drops in* what's up?
Tim: ROBIN'S FUCKING- I DON'T EVEN KNOW BUT I CAN'T UNDERSTAND HIM. *to Damian* say it again, fucking show Hood.
Damian: *grunt-hum*.
Jason, without blinking: pogo-stick.
Damian: SEE.
Tim, genuinely about to loose his shit: FUCKING WHAT.
everybody is so sick of these two's shit.
snowghoul
titsay
jbbartram-illu
blakekathryn
ellievsbear
