Here is a dish of fried fermented wheat berries. It looks like you can make all kinds of dishes with fermented wheat berries. Yes, it could be a European alternative to fermented brown rice.
Our gut microbiota is different from persons to persons and regions to regions. While East Asians have microbes that like to consume rice, Europeans may have different microbes that like something else, and usually you have microbes that like to eat your staple food since it has been part of your dietary culture for centuries. That is another concept of Shindofuji, eating locally and seasonally. There should be microbes suitable to you and they should like locally grown grains which contain regional bacteria.