A good part of communication in human society is through

A good part of communication in human society moves through formal language, the structured shared code of words that lets meaning pass reliably between people.

Its agreed grammar and vocabulary carry most sustained, precise exchange, from teaching and law to record and instruction.

Naming para-language captures only tone, pitch and volume, an accompaniment to speech rather than its main body.

Calling it infographics narrows communication to one visual format that handles a small slice of daily exchange.

Treating it as hidden emotions points to what is unspoken, which is real but not the bulk of society's communication.

Language being learned socially and used to share meaning is why the formal code carries the great share of human exchange.