stripping out gendered pronouns from tsis and giving them the fun, 1st person dual pronoun, and further:
and
this second one is totally hakagram graush's shadow hand trolling the dark jedi exiles by going 'yeah yeah hakagram and i were the only ones to use these super-special secret pronouns when it was just us having uh evil sleepovers' because the 1st person dual pronoun evolved overtime to be used by the kissai while the regular 1st person plural was used by everyone else. the nominative, the genitive plural, and the instrumental cases are the only ones that retain the original phonemic structure while the rest just slurred 'ari' into the 'arjV' glide.
plagueis was sus about the make-up but didn't say anything, sidious accepts it whole-heartedly (of course there are special pronouns for me), never taught them to maul, dooku found them on his own and probably hakagram graush's shadow hand's sekrit journal, anakin vacillated between 'yes i am that special, i get special pronouns' and so depressed he didn't care and would end up using the 'peasant class' 1st person plural, thoroughly enraging sidious (are you referring to us as grotthu, apprentice?).