Many culinary traditions ferment their grains in one way or another. It is not the same as vegetable fermentation because it involves a completely different lactic acid bacteria called Lactobacillus sanfranciscensis which lives in symbiosis with a yeast called Candida humilis.
Grains are a great staple wholefood that we should include in our diet as long as they are not refined. White flour is processed so much that there are few nutrients left, which means the manufacturers have to add back artificially-made vitamins and minerals to be able to sell it as a food. Grains can also be hard to digest for many people, and can benefit greatly from a fermentation process.