Hi, I saw your question in IRC. If I understand correctly, you want one of these:
- A bot to delete all the local mediawiki:messages, because you've now got all of them properly translated in translatewiki - If so, there is a maintenance script that can do this. File the request on phabricator with the project "site-requests". Add a "See also" link to Phab:T45917.
- A bot to copy all the local mediawiki:messages into translatewiki - If so, file the request on phabricator with the project "translatewiki.net", and they might be able to help you. I'm not sure if this is possible.
I hope that helps.