It doesn't really work that way. Stephen Pinker talks about this in some of his books. In the real world, some communities have used very restricted languages

It doesn't really work that way. Stephen Pinker talks about this in some of his books. In the real world, some communities have used very restricted languages ("pidgins") for work and trade. But when you raise the next generation in such a language they quite spontaneously complexify and enrich the original pidgin into something called a creole. And creoles are full-featured languages.