Body language is a type of communication in which physical behaviors, as opposed to words, are used to express or convey information. Such behavior includes facial expressions, body posture, gestures, eye movement, touch and the use of space

Here's the definition. we can have an argument about semantics if you want, but that's pointless.

Here's the difference between sign and body language:

Sign Language is a recognized and standardized language that involves using signs and signals to communicate with people with special needs. Body Language, on the other hand, depends more on your individual levels of understanding and interpreting hidden meanings behind certain observations in a person's behavior.

Please stop wasting time arguing semantics with me and approach my argument from the context of what I've originally said. Otherwise, we are debating 2 different things, in a space of stuff that Is fundamentally unprovable anyway. It's stupid