Seonglae ChoUnicode is locale-dependent
for some operations and for rendering. ||lll|l||||IIII||||llll||
Unicodes
Unicode Notion
The Absolute Minimum Every Software Developer Must Know About Unicode in 2023 (Still No Excuses!)
Modern extension to classic 2003 article by Joel Spolsky
https://tonsky.me/blog/unicode
Data sumggling
Smuggling arbitrary data through an emoji
With ZWJ (Zero Width Joiner) sequences you could in theory encode an unlimited amount of data in a single emoji.
https://paulbutler.org/2025/smuggling-arbitrary-data-through-an-emoji/
