faces-context.xml

<?xml version="1.0" encoding="UTF-8"?>

<faces-config xmlns="http://java.sun.com/xml/ns/javaee"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_2_0.xsd"
   version="2.0">

   <!-- allow implicit JSF access to spring beans -->
   <application>
      <el-resolver>org.springframework.web.jsf.el.SpringBeanFacesELResolver</el-resolver>
   </application>
   <application>
      <locale-config>
         <default-locale>de</default-locale>
         <supported-locale>en</supported-locale>
         <supported-locale>de</supported-locale>
      </locale-config>
      <resource-bundle>
         <base-name>properties.messages</base-name>
         <var>msgs</var>
      </resource-bundle>
   </application>
</faces-config>