Some examples (in different namespaces):

The template does not 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 moved after 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.

This template wraps the magic 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}} */
SELECT page_title, pp_value AS displaytitle
FROM page
JOIN page_props ON pp_page=page_id AND pp_propname="displaytitle"
WHERE page_namespace=0
AND CONVERT(pp_value USING utf8mb4) COLLATE utf8mb4_bin /* &#greek; */
    REGEXP "^([_ :]+|<[^<>]+>)*([[:lower:]]|&#9[4-6][0-9];)"

• Wikipedia:Naming conventions (technical restrictions)#Lowercase first letter