The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Literature by medium (1 member)
- Liðakuin (5 members)
- Liðakuin adjectives (1 member)
- Liðakuin templates (6 members)
- Liðakuin word classes (1 member)
- Liðakuin words (2 members)
- Lua-based templates (6 members)
- Male characters (2 members)
- Manufactured goods (1 member)
- Media formats (1 member)
- Module documentation pages (3 members)
- Modules subject to page protection (4 members)
- Modules that check for strip markers (1 member)
- Modules that manipulate strings (1 member)
- Navbox templates (2 members)
- Navigation templates (7 members)
- Pages using infobox character with unknown parameters (1 member)
- Pages with TemplateStyles errors (1 member)
- Pages with broken file links (6 members)
- Pages with script errors (53 members)
- Pages with short description (2 members)
- Paper products (1 member)
- Print media (1 member)
- Protection templates (1 member)
- Publications by format (1 member)
- Publishing (1 member)
- Redirects from shortcuts (1 member)
- Redirects from template shortcuts (3 members)
- Rokadong (2 members)
- Rokadong nouns (1 member)
- Rokadong templates (6 members)
- Rokadong words (1 member)
- Script character templates (1 member)
- Short description related modules (1 member)
- Template documentation (1 member)
- Template documentation pages (28 members)
- Templates (4 members)
- Templates needing substitution checking (1 member)
- Templates that add a tracking category (6 members)
- Templates that generate named references (1 member)
- Templates that generate short descriptions (2 members)
- Templates using TemplateData (9 members)
- Top icon protection templates (1 member)
- Video game infobox templates (1 member)
- Wikidata modules (1 member)
- Wikipedia formatting templates (1 member)
- Wikipedia multilingual support templates (1 member)
- Wikipedia never-substituted templates (1 member)
- Wikipedia templates (0 members)
- Written communication (1 member)