[Reddit]: How does the brain store different languages?
I thought this thread was interesting:
For anyone puzzled by the large number of deleted comments in the thead, that particular subreddit (AskScience) has a very strict moderation policy and comments based only on anecdote or 'intuition' are removed.
BTW, two other good subreddits that people here might find interesting are:
The study you're referring to mentioned that people who know more than one language can tolerate twice as much brain damage before they're diagnosed with dementia than people who only know one language. Just because the onset is delayed doesn't mean that you're free of the damage that causes neurological degradation.