Nulltongue
A terminal-safe hacker language and monospace font: ordinary UTF-8 drawn as an alien syllabary and logograph set.
Nulltongue started as a way to read a terminal, and talk in public, without anyone looking over your shoulder knowing what was said. It grew into a whole writing system: lowercase a-z is a phonetic syllabary in five sound families, uppercase A-Z are logographs for hacker concepts, and digits and punctuation get their own shapes — with a vocabulary, a grammar, a textbook and graded reading tests on top. The underlying text never stops being plain UTF-8, and every printable ASCII cell keeps one fixed width, so it works as a daily terminal font without breaking a single TUI. Three weights, TTF/OTF/WOFF/WOFF2, and Nerd Font variants. It is obfuscation, not cryptography — switch the font back and the text is right there — but to anyone who has not learned it, it is unreadable.