But that's not universal either; I have a friend who started losing english vocabulary when they first learned french. (The collected-anecdote metaphor (not, a

But that's not universal either; I have a friend who started losing english vocabulary when they first learned french. (The collected-anecdote metaphor (not, afaik backed up by any particular cognitive science) seems to be having "slots" for language, one-vs-two-vs-many...)