second way
See the file message.properties contained in the jar archive of the JSF implementation used. Recover key messages you want to change and see them in your own file bundle. Then declare this file in the bundle configuration file faces-config.xml:
<message-bundle>
my.package.my.file.bundle </ message-bundle>
and use the tag <h:message for="id_of_your_component" />
thanks
good luck
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