In study, Bilin­gual brains stay sharp longer We have seen a num­ber of stud­ies on why and how speak­ing more than one lan­guage may help build a Cog­ni­tive Reserve (inter­view with Yaakov Stern) that pro­tects us against cog­ni­tive decline. This arti­cle does a good job at explain­ing what may be going on (bold added by me):…