NW04: WebDynpro in EP6.0, language

Hi,

I have developed a wd application that I have deployed to our portal. My application contains a DateNavigator, among other ui elements. Because we want to support users with different languages I have searched for the opportunity to display the name of each day of the DateNavigator based on the user's language.

When I check the session object attributes in the portal (System administration -> System configuration -> Web Dynpro Console -> About -> Sessions) I can see that the "display language" changes between different ClientUsers.

Does anyone know what this "display language" is based on? Where can I change it? Seemingly, it is not dependent on the portal language in the Personalize menu.

Best regards

Øyvind