Commit was proposed, please do planning for deploy.

Can't find your patch in Gerrit.

After some various changes, current mode for Wikikidata 'Mainpage' is "single page for any languages" (with automated substitution translated version related with UI language).

Are you sure this is the current mode for all languages? I found MediaWiki:Mainpage/is, at least, which currently contains “Wikidata:Forsíða/is”, and Wikidata:Forsíða/is is a separate page, not a redirect.

I think the safer approach would be to first go through [a search for prefix:MediaWiki/mainpage](https://www.wikidata.org/w/index.php?search=prefix%3AMediaWiki%3AMainpage) and delete each page found there after verifying that the page given by the message content is only a redirect to the main page, so that the message will fall back to the generic version. Then, once there are no more such message pages, we’ll know that it’s safe to remove 'mainpage' from $wgForceUIMsgAsContentMsg.

@Lucas_Werkmeister_WMDE - you are right. See result of fast check: https://www.wikidata.org/wiki/User:Kaganer/fix-mainpage

Proposed change will lead to an unrecoverable problem for the variants zh-*** - switch for language options what is available in "Wikidata:Main_Page/Content/zh" will be not available on the "Wikidata:Main_Page", but only in "Wikidata:Main_Page/zh"

Please note, that current mode is also with incomplete functionality for zh-*** - main template is swithed, but sections that called through template based on {{int:Lang}}, is not swithed.

Change 790706 had a related patch set uploaded (by Stang; author: Stang):

[operations/mediawiki-config@master] wikidata: Remove 'mainpage' from wgForceUIMsgAsContentMsg

https://gerrit.wikimedia.org/r/790706

In T184386#7917902, @Stang wrote:

Need to verify if all targets includes in subpages under MediaWiki:Mainpage could be replaced by a redirect to Wikidata:Main_Page. IMO current logic for handling zh-* looks fine.

Nope. As example, for 'ckb'

• configured pagename Wikidata:دەستپێک - and this page has own separate wiki-code
• this is not identical with the Wikidata:Main_Page/Content/ckb.

For next step is needed some further research and community consultations.

This really needs to be changed. There are hundreds of languages (approximately 350) where the main page is completely broken, e.g.

• https://www.wikidata.org/?uselang=ig
• https://www.wikidata.org/?uselang=sm
• https://www.wikidata.org/?uselang=sms
• https://www.wikidata.org/?uselang=mni
• https://www.wikidata.org/?uselang=mnw

There are plenty of other multilingual wikis which have a translatable main page without using this option:

• mediawiki.org
• meta.wikimedia.org
• incubator.wikimedia.org
• wikifunctions.org
• wikisource.org
• foundation.wikimedia.org
• outreach.wikimedia.org
• wikimania.wikimedia.org

There aren't many which do use this and they all have broken main pages in the majority of languages:

• Wikidata
• Commons
• Wikispecies

Of the subpages of MediaWiki:Mainpage, 92 contain "Wikidata:Main Page" or another page which redirects to it and 27 point to a page which is the same as the translatable main page.

23 are using the pre-2014 main page design and still haven't been updated a decade later.

The only ones which use the 2014 main page design but aren't identical to the translatable page are bn, ckb/ku-arab and or.

Change 790706 abandoned by Stang:

[operations/mediawiki-config@master] wikidata: Remove 'mainpage' from wgForceUIMsgAsContentMsg

Reason:

doing by someone else

https://gerrit.wikimedia.org/r/790706