Last modified: 2014-10-27 15:08:35 UTC
The message Wikibase-label-edit-placeholder inserts a language name as $1. The language name is the autonym. It would be better to use the name in translation to the UI language, so that it would look like "enter label in German" rather than "enter label in Deutsch".
I suppose it is what has been done in: https://gerrit.wikimedia.org/r/#/c/166209/