So anon has been digging recently on the origins of human knowledge and language. Very interesting stuff here as it turns out.
https://udallas.edu/braniff/_documents/davis_m_rousseau_eol.pdf
The basic premise of this Rousseau paper on the subject is that the original form of language was the basic sounds that animals make, expressing emotions through a mutually understood song, built upon our shared understanding of the natural world from a human perspective. Then as human society evolved and became more complex, it became beneficial to specify different sounds to express more specific thoughts in communication with each other, but some of the raw emotional communication gets lost in the process.