Since seam uses hibernate validator internally when using the tags s:validate and s:validateAll, I think it should update the locale used for hibernate validator messages when one invokes localeSelector.select Obviously, it doesn't since the hibernate validator error messages are in the language specified in the browser preference settings rather than the seam locale. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4078250#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...