About [[MediaWiki:Configure-setting-wgUserrightsInterwikiDelimiter/pl]]
Fragment of a discussion from Translating talk:MediaWiki/LiquidThreads
I don't think it's a good idea to enable the Configure extension on MediaWiki.org, but this is not the place to discuss that. I propose you take that to mw:.
Yes, I had already mentioned it on mw:Thread:Project:Current_issues/_Project:Translate_extension and I now opened bugzilla:43380.