SharePoint 2007 Force Culture and UI Culture

i'm developing a sharepoint portal, and i want to force a portal culture to 'pt-PT', i already installed the moss and wss language packs and i changed the web.config too with the following statment: but if i set the browser language to other language the controls change their culture (this only occurs in portal 开发者_Go百科frontoffice, in backoffice the culture is always pt). What i have to do to fix this problem?

You can write a HttpModule which will switch the culture of the executing HttpContext early in the page lifecycle.

BTW I'm just wondering what you mean when you say portal frontoffice vs backoffice.