This string is not available in GlotPress: https://core.trac.wordpress.org/browser/tags/4.1/src/wp-admin/includes/schema.php#L361
It should be in Administration project, but it is missing.
All localized versions are missing this stringString A string is a translatable part of the software. A translation consists of a multitude of localized strings. and that is why there is default zero offset.
Maybe @nacin should look at it?