It is simplified. There aren't irrelevant details. If I change language with localeSelector, the locale change it after call action setParameters. In this setParameters locale language is the previus language before I change with localeSelector. If use immediate="true" in h:selectOneMenu --> Do same thing !!! If use immediate="true" in h:commandButton --> Do nothing !! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3996247#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...