"grdzeli_kaci" wrote : i have added this fragment into my faces-config.xml file<locale-config> | | : | | <supported-locale>en</supported-locale> | | : | | </locale-config> I think the supported-locale's are only needed when NOT explictely listing the available languages in the selectOneMenu. So, when using the list in faces-config.xml then your language selector could look like this: <h:selectOneMenu value="#{localeSelector.localeString}"> | <f:selectItems value="#{localeSelector.supportedLocales}"/> | </h:selectOneMenu> | <h:commandButton action="#{localeSelector.select}" value="#{messages['ChangeLanguage']}"/> (taken from the Seam documentation) But this is not the cause of your problem; waynebagguley already explained what's wrong. If you want to change the language without a button then see HOWTO: override ThemeSelector (valueChangeListener, cookie name). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4029780#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...