localemngr.dll is a NICE_LOCALMNGR
belonging to NICE_LocalMngr Module
from Nice Systems
Non-system processes like localemngr.dll originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues.