Application Primary Language = English (EN-US):

 0 . 02 : 
 0 . 02 : Language derived from: FLOW_PRIMARY_LANGUAGE, current browser language: en-us
 0 . 03 : alter session set nls_language="AMERICAN"
 0 . 03 : alter session set nls_territory="AMERICA"
 0 . 03 : NLS: CSV charset=WE8MSWIN1252
 0 . 03 : ...NLS: Set Decimal separator="."
 0 . 03 : ...NLS: Set NLS Group separator=","
 0 . 03 : ...NLS: Set date format="DD-MON-RR"
 0 . 03 : ...Setting session time_zone to + 03 : 00 
 0 . 03 : Setting NLS_DATE_FORMAT to application date format: YYYY-MM-DD
 0 . 03 : ...NLS: Set date format="YYYY-MM-DD"
 0 . 03 : NLS: Language=en-us
 0 . 03 : Application  100 , Authentication: CUSTOM2, Page Template:  1078532733848753 
 0 . 03 : ...Session ID  4431323040060078  can be used
 0 . 03 : ...Check for session expiration:
 0 . 03 : Session: Fetch session header information
 0 . 03 : ...Metadata: Fetch page attributes for application  100 , page  4 
 0 . 03 : Fetch session state from database
 0 . 03 : Branch point: BEFORE_HEADER
 0 . 03 : Fetch application meta data
 0 . 04 : Setting NLS_DATE_FORMAT to application date format: YYYY-MM-DD
 0 . 04 : ...NLS: Set date format="YYYY-MM-DD"
 0 . 04 : Computation point: BEFORE_HEADER
 0 . 04 : Processing point: BEFORE_HEADER
 0 . 04 : Show page template header
    
 0 . 04 : Computation point: AFTER_HEADER
 0 . 04 : Processing point: AFTER_HEADER

результат - дробная точка, разделителя разрядов нет:
 Empno Empno Display Ename Job Mgr Hiredate Sal Comm Deptno 
  7839    7839      KING PRESIDENT -  1981 - 11 - 17   5000 . 25  -  10  


Application Primary Language = Russian (RU):

 0 . 01 : Language derived from: FLOW_PRIMARY_LANGUAGE, current browser language: ru
 0 . 01 : alter session set nls_language="RUSSIAN"
 0 . 01 : alter session set nls_territory="RUSSIA"
 0 . 01 : NLS: CSV charset=CL8MSWIN1251
 0 . 01 : ...NLS: Set Decimal separator=","
 0 . 01 : ...NLS: Set NLS Group separator=" "
 0 . 01 : ...NLS: Set date format="DD.MM.RR"
 0 . 01 : ...Setting session time_zone to + 03 : 00 
 0 . 01 : Setting NLS_DATE_FORMAT to application date format: YYYY-MM-DD
 0 . 01 : ...NLS: Set date format="YYYY-MM-DD"
 0 . 01 : NLS: Language=ru
 0 . 01 : Application  100 , Authentication: CUSTOM2, Page Template:  1078532733848753 
 0 . 01 : ...Check for session expiration:
 0 . 01 : Session: Fetch session header information
 0 . 01 : ...Metadata: Fetch page attributes for application  100 , page  4 
 0 . 01 : Fetch session state from database
 0 . 02 : Branch point: BEFORE_HEADER
 0 . 02 : Fetch application meta data
 0 . 02 : Setting NLS_DATE_FORMAT to application date format: YYYY-MM-DD
 0 . 02 : ...NLS: Set date format="YYYY-MM-DD"
 0 . 02 : Computation point: BEFORE_HEADER
 0 . 02 : Processing point: BEFORE_HEADER
 0 . 02 : Show page template header
    
 0 . 02 : Computation point: AFTER_HEADER
 0 . 02 : Processing point: AFTER_HEADER

результат - дробная запятая, разделителя разрядов нет:
  Empno Empno Display Ename Job Mgr Hiredate Sal Comm Deptno 
   7839   7839       KING PRESIDENT -  1981 - 11 - 17   5000 , 25  -  10