language files recovery
Hi, I'm not sure if i accidentally deleted some unwanted language files in os X yosemite, wondering 1) if its a big deal and if so 2) how do i check if i deleted them or not and 3) will a system update in the future automatically recover those language files? thank you very much!
MacBook Pro with Retina display, OS X Yosemite (10.10.2), null