JSF internationalization doesn't work for bundles declared in faces-config.xml or <f:loadBundle>

<?xml version="1.0" encoding="UTF-8"?>
<faces-config version="2.0" xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:xi="http://www.w3.org/2001/XInclude" 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">
	<navigation-rule>
		<from-view-id>/pages/inputname.inc</from-view-id>
		<navigation-case>
			<from-outcome>greeting</from-outcome>
			<to-view-id>/pages/greeting.xhtml</to-view-id>
		</navigation-case>
	</navigation-rule>
	<application>
		<locale-config>
			<default-locale>en</default-locale>
			<supported-locale>de</supported-locale>
		</locale-config>
		<resource-bundle>
			<base-name>resources</base-name>
			<var>msgs</var>
		</resource-bundle>
	</application>
</faces-config>

prompt=Your Name\:
greeting=Hallo
aaa=ass