I logged in as an admin to try to edit the sidebar menu for my wiki, but was unable to, with this message displayed:
"This page provides interface text for the software on this wiki, and is protected to prevent abuse. To add or change translations for all wikis, please use translatewiki.net, the MediaWiki localisation project."
I don't know when this change happened or how, but I'd like to be able to edit the sidebar menu link labels. There is no translation of this page, nor do I know anything about the framework behind wiki translations and localisation.
What do I do from here to get back to a 1-language wiki, or at least a situation where I can edit the page?