The toolbar is served using MediaWiki core, and the text is contained within the message i18n files that come with the installation.
1. We don't edit the core files as it's impossible to keep a track of all the changes when we upgrade 2. If we change the english text for that, we also need to change the 385 other languages. Then we need to manually patch each language file every time we upgrade.
So primarily because of point 1, unfortunately, this cannot be fixed.
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You can view and copy the source of this page.Ttguy (talk)