Provide english texts in 2 files

In the IBM JVM text key resolving happens in this order:

• bundle_<locale>.properties
• bundle_<SystemProperty user.language>.properties
• bundle.properties

English framework texts are provided in the file struts-messages.properties only. When an application developer has set user.language to a value for which framework texts are present (e.g. de), he does not get the requested english text although it is present.

As workaround I propose to provide english texts in 2 files:

• struts-messages.properties
• struts-messages_en.properties

Maybe the file can be copied during builds?