The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Talmithe/Geography (9 members)
- Talmithe/History (4 members)
- Talmithe/Locations (9 members)
- Talmithe/People (3 members)
- Talmithe/Settlements (6 members)
- Talmithe/Towns (1 member)
- Tamkaranu (20 members)
- Tamkaranu/Cities (4 members)
- Tamkaranu/Geography (2 members)
- Tamkaranu/History (21 members)
- Tamkaranu/Locations (2 members)
- Tamkaranu/People (5 members)
- Tamkaranu/Settlements (4 members)
- Tamkaranu /History (0 members)
- Tar Drinkers (1 member)
- Tarkuus (12 members)
- Tarkuus/Cities (1 member)
- Tarkuus/Forts (1 member)
- Tarkuus/Geography (5 members)
- Tarkuus/History (7 members)
- Tarkuus/Locations (5 members)
- Tarkuus/People (2 members)
- Tarkuus/Settlements (2 members)
- Technology (6 members)
- Teleportation (4 members)
- Tengu (14 members)
- Teshub (3 members)
- Teshub/History (2 members)
- Teshub/People (1 member)
- Thadria (19 members)
- The Mire (0 members)
- Theocracies (2 members)
- Thevrumines (1 member)
- Thevrumines/People (1 member)
- Tidelords (2 members)
- Tidelords/People (2 members)
- Tieflings (2 members)
- Timakal (4 members)
- Titles (25 members)
- Tomb-Builders (1 member)
- Topics (28 members)
- Town (2 members)
- Towns (86 members)
- Trade routes (6 members)
- Trailblazer Republics (2 members)
- Trailblazer Republics/Geography (1 member)
- Trailblazer Republics/Locations (1 member)
- Transportation (14 members)
- Tribes (15 members)
- Trolls (2 members)