Simply add thewikitext markup{{Lowercase title}} at the beginning of a page (and optionally, at the beginning of its talk page). The markup will only decapitalize the first letter of the page's name in the title at the beginning of the page by default.
The template doesnot work together with other title modification templates: you need to use DISPLAYTITLE directly and make sure it's the last DISPLAYTITLE on the page. For example, to make "Example" italic and lowercase, use{{DISPLAYTITLE:''example''}}.
When using the template on redirect pages, the template must be movedafter the redirect, since otherwise it will break the redirection. This, however, limits the template to have an effect only when viewing the redirect page directly. Nevertheless, it is still useful in this scenario in order to document the proper capitalization of a term.
When using on templates, please make sure to wrap it with a <noinclude> tag, so that transcluded pages don't get affected.
Technical
This template wraps themagic word DISPLAYTITLE so that it works automatically in any namespace (main/article, talk, template, category, etc.) to decapitalise the first letter of the name of a page it is transcluded on.
/* Page using a lowercase title, with or without {{lowercase}} */SELECTpage_title,pp_valueASdisplaytitleFROMpageJOINpage_propsONpp_page=page_idANDpp_propname="displaytitle"WHEREpage_namespace=0ANDCONVERT(pp_valueUSINGutf8mb4)COLLATEutf8mb4_bin/* &#greek; */REGEXP"^([_ :]+|<[^<>]+>)*([[:lower:]]|	[4-6][0-9];)"