Multidirectional language conversion for content pages using LanguageConverter should be prevented on multilingual wikis.
This was caused by {T39338} as it is not a Meta-Wiki-only configuration change.
This is not an issue for monodirectional language conversion; however, this had caused several issues:
* The `{{ll` template cannot recognize LanguageConverter syntax in the page display title
** Especially for MediaWiki.org
* LanguageConverter syntax exposed on pages without original converter and cannot easily choose the variant to transclude
** For example, we cannot choose to transclude the converted zh-hant version from zh pages in non-zh pages.
* The Translate special page become a mess because:
** Badly mixed translation memories (TM)
** There are no proper places to place page-wide conversion rules
** There are many manual conversion tags in the translation unit
** The preview cannot handle LanguageConverter syntax properly
* {T39557}
* (to be addressed)
On a translation management perspective, the way we translate MediaWiki.org should be like we translate system interface messages on translatewiki.net.