https://vuink.com/post/nyrkrl-d-dfucnxbifxl-d-deh/en/i-accidentally-the-runes-d-dhtml
How to add custom keyboard layout on Linux
Recently on Fediverse I stumbled upon someone with runic username. Quick check - and, turns out, runes are part of Unicode since 1999! Also, Wikipedia.
custom keyboard layoutaddlinux