locale —
get locale-specific information
  
    | locale | [ -ck] [keyword ...] | 
The locale utility is supposed to provide most locale
  specific information to the standard output.
When locale is invoked without arguments
    it will print out a summary of the current locale environment depending on
    environment variable settings and internal status.
When locale is invoked with arguments and
    no options specified it will print out
    keyword's value determined using
    current locale settings.
The following options are available:
  - -a
- Write names of all available locales. While looking for locales
      localewill respect thePATH_LOCALEenvironment variable, and use it
      instead of the system default locale directory.
- -c
- Write the category name for the selected keywords.
- -k
- Write the name and value of the selected keywords.
- -m
- Write names of all available charmaps.
Special (FreeBSD- /
  NetBSD-specific) keyword list
  can be used to retrieve a human readable list of available keywords.
Thelocale utility exits 0 on success,
  and >0 if an error occurs.
locale conforms to IEEE Std 1003.1-2001
  (“POSIX.1”).
locale first appeared in NetBSD
  2.0.
This implementation of locale was originally written by
  Alexey Zelkin ⟨phantom@FreeBSD.org⟩ for
  FreeBSD.
Since NetBSD does not support
  charmaps in their
  POSIX meaning locale emulates the
  -m option via CODESETs listing of all available
  locales.