False {{used in system}}

SQL

select dst.page_namespace, dst.page_title from templatelinks 
join page dst on page_id=tl_from
where tl_title = "Used_in_system"
and (dst.page_namespace = 10 or dst.page_namespace = 828)
and exists (select 1 from templatelinks tl2 join page src on tl_from=src.page_id 
where tl2.tl_from_namespace = 8
and src.page_title != "Deletedtext" and src.page_title != "Filedelete-success" /* these messages transclude their own talk page */
and src.page_title not like "Ffeed%" /* while templates used on the main page are protected, they don't need to be tagged 
as used in system, even though [[mw:Extension:FeaturedFeeds]] is installed */ 
and src.page_title != "Category-move-redirect-override" /* not a system message in the normal sense */
and src.page_title not like "Ipbreason-dropdown%"
and src.page_title not like "Spam-%list/Indicators"
and src.page_title != "Watcheditlist/Check_all"
and src.page_content_model = "wikitext"
and src.page_is_redirect = 0
and src.page_title != "Move-redirect-text"
              )
and dst.page_title not like "%/sandbox"
and dst.page_title not like "%/testcases"
and dst.page_title not like "%/doc"
SQL

Checking query status...
