<core:resource-loader>
     <core:bundle-names>
       <value>alp_messages</value>
     </core:bundle-names>
</core:resource-loader>

I added the above to components.xml and change my deployment to copy all alp_messages* to classes.

If the file is called alp_messages.properties it gets picked up. However if it is named alp_messages_sv.properties or alp_messages_de.properties it's not picked up.

Is this a missing feature maybe?