The main idea of the Sapir-Whorf hypothesis is that the structure of our grammar channels the way we think. There have been experiments to support this, but the hypothesis has never been proven to the extent that is often implied. […]
A language might try to convey very small pieces of information through grammatical bits. Prefixes and suffixes are such bits. However, they did not start as prefixes and suffixes. They were whole words that conveyed the same meaning when Stage One of the language began. […]
It is believed that languages evolve as speakers of different languages meet, live together, and communicate. This is what happened to many languages around the world. However, there is a theory that debunks this idea completely.