The locale setting determines the language with which `{x,y,z}{d,m}tics` will write the days and months.
Syntax:
set locale {"<locale>"}
<locale> may be any language designation acceptable to your installation. See your system documentation for the available options. The command `set locale ""` will try to determine the locale from the LC_TIME, LC_ALL, or LANG environment variables.
To change the decimal point locale, see decimalsign. To change the character encoding to the current locale, see encoding.