There are two poles of thought about how language is acquired.
One (the Nativists) suggests it is an innate skill specific to our species (Lenneberg).
The other (the Behaviorists) accounts for it in terms of learning theory (Skinner).
To cut to the quick, both are involved and... yet much more. Language does erupt and develop like a seed when it is given water. The water for language is speech (or signs) particularly when they occur as part of a social interaction.
It is difficult to forestall the growth of language under these conditions. But like a seed, the size of the ultimate plant is open to question.
Or better yet, let's build the GOLDEN GATE
Like a growing plant, language can develop into a twig or a tree, depending upon the nourishment it receives.
Correspondingly, the language a child will develop may be as restricted as a foot bridge or as broad as the Brooklyn Bridge, to open the way for communication with the world inside and out..
If language is the bridge by which we connect with our past, our present, our future; and with ourselves, I would like to think that we would get for each child a bridge as broad as the Brooklyn Bridge, or better yet, the Golden Gate !
Then for the rest of their lives, their access to information and their ability to process it would be maximally assured.