This is an odd question. I was thinking about octopuses and wondering about the nature of language. To my knowledge (and this isn't my field) all human language has a phonetic components. Are there any visual based writing systems or "languages" that you could teach that do not contain any sound based communication or start with a foundation of such. Deaf people are able to read and write so maybe I am thinking to much into this but the thought experiment of teaching an octopus a language has me interested. Are there special tools or processes that are used for deaf individuals to help them that could theoretically be applied.
Ultimately just curious. Would be interested to hear any thoughts or. Answers. Thank you.