1: selected language

2: your language title 

         if you have multiple language you can see multiple title for multiple language , if you add custom field title for multiple language  when you change language it will be show as a translator language.

3: select language always required (if you enable and selected Arabic language , title[Ar] will be required.

4:variable:

        it's uses for legal contact and case print layout.

when you create custom field for client/case and fill variable field, custom field  will show into client and case section

and variable show into legal contract and Print Layout->Add New Layout

value will be show when case and client submit with custom field value. other wise variable not replace into legal contact and print case layout .

   1:  when  you create custom field  for Client with variable here variable will be show 

note: If Client Not given custom field value  , variable not be replace .into client panel

Print Layout->Add New Layout

   1:  when  you create custom field for Client or Case with variable here variable will be show 

note: If Client/ Case  Not given custom field value  ,variable  not be replace  Print With layout