find all of the places in the code that refer to the 'language' system preference and rename them to 'StaffInterfaceLanguage' write an atomic update to rename the language system preference to StaffInterfaceLanguage in the preferences table in the database rename the language syspref in sysprefs.sql refer to bug 10328 for an example
instead of StaffInterfaceLanguage, make that StaffInterfaceLanguages