Actual user account management should be done through System Preferences.
The keyboard layout options can be modified under System Preferences.
To get there, go to the Apple menu to System Preferences.
Of course you can also change audio in- and outputs through the System Preferences.
I'm not sure if System Preferences actually uses Spotlight to do the search.
System Preferences handles this situation with a reasonable amount of grace.
Before moving on, System Preferences has one neat trick.
This works even when System Preferences is not yet running.
Users have the option to return to the old dashboard configuration in System Preferences.
By "System Preferences", I mean more than just the application of the same name, which was covered earlier.