Exactly. Well said.
No. It is not. Please do some reading about linguistics. There are rules about what constitutes a languages (or a dialect or a pidgin) and it has actually very little to do with communication. Communication is possible without any language at all. "Body language" is not a real language, it is a system of communication. Just because we call something a "language" for the sake of conversation does not make it a true language, like the "language of the birds" (not a real language because it doesn't hold the potential of making new propositions about the future, for example).
You have some romantic views of language and communication and that's very nice but they are not scientifically or linguistically accurate.
