List of all system messages of translatewiki.net cannot be displayed

So I found the message in the Thanks extension by German Wikipedia system messages. And only because I found the message name on the help page for the Echo extension in German WP which I found by a link in an information banner. For the time stamp message I have the text only - the only text that could be true is this for MediaWiki:Centralauth-days-ago/de. But Centralauth is another extension.

Michawiki (talk)‎19:33, 1 December 2013
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