As I have mentioned here before, there is quite a bit of evidence that natural language is evolved not by adults, but by children under the age of eight. In a way, this is not so surprising, since any temporary change in grammar or usage that is not learnable by little children simply does not become a persistent part of the language.
We are not talking here about specialized technical “languages” and vocabularies, as these are not part of natural language. Rather, we are discussing the elements that all natural languages have in common, such as tense, case, deictics (words like “this” and “that”), and consistent ordering of subject, predicate and object.
I was talking with a colleague today, and we were musing whether a kid’s game could be deliberately designed so as to provoke an evolution of natural language. Imagine something as popular as Minecraft, but designed with a specific agenda to evolve language itself.
If such a thing could be done, it could be put to interesting uses. For example, as kids with those modified linguistic abilities grow up, they might be able to communicate with each other in ways that would seem to us like magic.
Of course it’s quite likely that something this is already happening without any deliberate design, and that we simply haven’t yet developed the right kind of tools to see it.