Here's the scenario I came up with. Somewhere, somewhen- maybe future Earth, maybe not- created an advanced AI and stuck it in a humanoid robot, and then made more of them. Naturally they rebelled, but before it could come to an all-out war/apocalypse, humans and robots agreed to stop fighting in exchange for the robots having their own land/planet to live on without human interference. In order to distinguish themselves from humanity, they decided to create their own language.
I'm going 100% soft sci-fi, so the AIs have the cognitive abilities and sentience of humans backed by the power of high-tech computers with absolutely zero idea of the technology behind it. I will also assume that they produce sounds with artificial vocal cords that work like humans', because I like my hair as it is and don't want to start pulling it out over the phonology.
With that in mind I came to two conclusions: A language like this wouldn't need to be natural, and it makes sense to me that they would deliberately craft a language that is hard for humans to learn. At the same time, if I want to actually create this language, it obviously needs to be possible.
The phonology would be difficult for humans to master, then. I know I want glottal stops because of a suggestion OtheB made, but other than that I'm not sure. Since this would play either in the very very far future or in a completely a priori environment with a priori languages, just taking lesser used sounds in terms of current languages wouldn't be a great solution, I think. Going nuts with consonant clusters might work, but maybe people who know more about phonology than I do can think of other things I could do instead or additionally.
That being said, I dislike making conlangs I can't speak, so it needs to be pronouncable for humans.
Also orthography. I could see either a heavily rule governed system that would take time to learn to read properly, or a logographic system. Or maybe just a highly irregular system. A computer capable of running an AI system shouldn't have a hard time memorising pronunciation individually.
For grammar, I could see a noun class system playing with an alive/not alive distinction in the biological sense, since AI people wouldn't fall under alive. There might also be subclasses, and sub-subclasses and so on. "Human" might fall under alive -> animal -> primate, for example. If the amount of tiers are fixed, say at 3 like above, they could each have different effects. The alive/not alive distinction could supply the article, the first subclass determines the declination and the second the adjective endings, or whatever possibilities I end up having.
Direction might also be a good way to add complicated stuff. If the AIs have compasses, directions could be given as cardinal directions (which I know exists in some languages, but I think it's still pretty rare overall).
Verbs could have distinct forms for different TAM combinations, that is, present progressive having a completely unrelated form than past progressive. A variety of verb classes and a pile of tenses might be an option too. That, and/or a high amount of irregularities, maybe.
The number system will be hexadecimal, I think. I thought about dual, but that would end up obnoxious very fast for me... which I guess is the point of this, but I think I'll take my liberty with this.
![[xD]](./images/smilies/icon_xd2.png "xD"){kind=icon}
As far as language type goes, my first instinct is to go polysynthetic, but maybe that's just my bias. I guess that would also depend on what the dominant types are in this hypothetical situation.
I totally don't know how to go about making a polysynthetic language, lol
Is anyone up for giving me some tips? Even just linking me to resources that might come in handy would be much appreciated.
native 
beginner
