If you read the article, the bit about using a videogame’s questing system to learn a language is reaaaal fascinating.
I first learned about Elfdalian last year, I believe… Although I first learned that runes were still used by some Swedes in ~1900 some years ago. Didn’t realise it was Elfdalian and the Elfdalian people who were writing it!
It’s a fascinating language, and for anyone interested in North Germanic languages and minority languages in general, take a look at the link.
And Minecraft! The game offers so many languages that no any other game I can remember of. At the beginning of my learning Welsh I’ve switched to Welsh in the game but then I did some big distruction by using something I didn’t understand what it is and the world blew off … (well, not literally but major part of where I was did). It also has Manx (Gaelg), Kornish (Kernewek), Latin and some I can’t even read as I do not have scripts in my PC. And it offers Slovene too, of course. There must be more though as I still have very old 1.8.1 version but now 1.11 is out already.
Then on Quizlet appears to have Elfdalian (if this is it, I don’t know). I actually searched for Elfdalian and found this: