Lego Bionicle
Different letter sets used in the Lego Bionicle world.
The Lego Bionicle universe has a few written languages, and each is simply a substitution cipher that replaces letters with symbols. The Matoran language can be written using circles or hexagons, depending on where it is used.
Metru Nui and Mata Nui
Bionicle
Bionicle
Voya Nui and Mahri Nui
Bionicle
Bionicle
There are also the Okotan symbols used on Okoto.
Okoto
Bionicle
Bionicle
These fonts were obtained from the GitHub project Bionicle-Fonts.