16 24hr: 24 hour format ( e.g. "14:18" )
17 12hr: 12 hour format ( e.g. "02:18 PM" )
21 - pref: CalendarFirstDayOfWeek
26 - as the first day of week in the calendar.
28 - "Enable the following languages on the staff interface:"
32 - pref: opaclanguagesdisplay
37 - patrons to change the language they see on the OPAC.
39 - "Enable the following languages on the OPAC:"
46 - for lists of browsable letters. This should be a space separated list of uppercase letters.