'How can I add a font to WhatsApp, Telegram, or Signal?
As the image below shows, WhatsApp (Web) now supports all of the active scripts in the Unicode BMP - incredible! I believe all of those fonts are in the app itself - it's not relying on system fonts at all.
The penultimate line shows a phrase in the Musa alphabet, which is encoded in the Unicode Private Use Area at E000-E1FF. As you can see, some of the codepoints are tofu, while others have emoji.
My question: is there any clever way to teach WhatsApp to use an installed Musa font to display those codepoints? Or Telegram? Or Signal?
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Source: Stack Overflow
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