Thread:Support/Re-using an identical message from the MediaWiki core into extension

I am working on a MediaWiki Extension.

I plan to create a message "myextension-nopreview" that will have the same context as the existing MediaWiki:license-nopreview message. I need to add this message to the MyExtension.i18n.php file. This file already contains lots of translations exported from the Translatewiki.

My first idea is to:


 * 1) extract the message contents for all messages from the core MediaWiki messages, add them one by one to the existing language stanzas in the MyExtension.i18n.php file.


 * 1) add the /qqq message description containing  string.


 * 1) commit the resulting MyExtension.i18n.php to the MediaWiki SVN.

My questions:


 * 1) Is the above ok?
 * 2) Is there any tool to perform conversion described in the step (1) automatically?
 * 3) Unfortunately, the core message has more languages than the extension ever had. Should I add a one-line stubs with this message only or is this a bad idea?

Thank you,