Interestingly, my mother started learning a foreign language recently and it got me thinking. Is anyone here well versed in the state of the art of brain plasti

Interestingly, my mother started learning a foreign language recently and it got me thinking. Is anyone here well versed in the state of the art of brain plasticity? I always wondered if you could slow down Alzheimer's disease by trying to "outpace" the brain decline by forming new connections at a faster pace. Learning a language was the first thing that came to mind. I'd also be very interested in a comparison of two language vs. three language. Switzerland would be the obvious choice but children from partners that don't speak the same language and use English as a lingua franca or Canadians with one extra language (Chinese living in Canada etc.) should provide a big enough sample.