Nobody Told Me Unicode Was This Weird — So I Built a Font Generator (opens in new tab)

Someone in a Discord server changed their username to something that looked like a different alphabet, except it wasn't. I copied it into a random site, pasted my own name, and it came back looking like 𝔠𝔥𝔯𝔦𝔰. Sent it to a friend. He asked how I did that. I had no idea. That should have been the end of it. I pasted the text, it worked, move on. But the question stayed: Discord doesn't support custom fonts. Nobody downloaded a plugin. The text just showed up different on everyone's screen. How...