i'm currently working on a conlang for cephalopod-like people!
their phonology consists of clicks & gestures, and colors & patterns (aesthetics).
the clicks and gestures are similar to how a human would use a signed and voiced language. and, tho their aesthetics are able to be controlled, their aesthetics directly reflects their mood, so it'll be difficult to control, which will have very interesting semantic nuances that are going to be fun to tackle when it comes to poetry!
tbh, i've only started on the writing system because the thought of a writing system for a language that uses aesthetics as a lexical element intrigued me.
the history of the writing system
from the beginning, when writing still wasn't invented, they would use figures (e.g. a predator's tooth to indicate harm/fighting, a shell to indicate playfulness, a shiny rock to indicate uniqueness) to imitate a story, similar to how children use their toys to reflect their imagination. eventually, those figures would later be used to imprint marine clay that'll be intertwined with weeds, similar to jewelry, where the gem is the figure and the metal is the weed. those weed-intertwined figures later become "charms" that are used as characters for a vertical logography, where each charm is connected with more weed. at this point, writing is used ritualistically, but eventually as exploration becomes more prominent, a more convenient writing system arises. i haven't gotten to that part lol.
but yeah that's what i have so far. (i actually have many more notes, but my notes are very erratic and unintelligible... like, the way i write my notes are random unconnected ideas splatted randomly using my awful handwriting, and most of the notes are just a bunch of little random details that i can't string together into a conceivable essay).