Add locale environment variables

Re-assign the $LANG environment variables to all the variants used by different programs. $LANG itself  should be set in your terminal emulator's options (ideally sourced from the underlying OS).
Add early and local settings options

Some local settings may be necessary to set early in the initialization process. Those can be dropped in ~/.localrc.before.

Some local settings may want to override things defined during initialization. Those can be dropped in ~/.localrc.