Internat.exe runs at startup; it loads the different input locales that are specified by the user. The locales to be loaded for the current user are taken from the following registry key:
Internat.exe loads the EN icon into the system tray, allowing the user to easily switch between locales. This icon disappears when the process is stopped, but the locales can still be changed through the Control Panel.
Note that the locales for the System are loaded from here:
These locales are used by system services that are running under the Local System account, or when no user is logged on (for example, at the logon prompt).