Language Change during login

Hi,

I have added a dropdown for language in the login screen of the portal by configuring the property UME.Logon.locale from False to True in the config tool.

But when I click the logon button, it is defaulting to English, and not picking up the chosen language.

To get the portal language set to the chosen one, do I need to change the coding in the logon.par? Or is there any configuration to be done in the J2EE config tool to pick up the chosen language.