[marginalia_nu]

Also worth pointing out that LLPSI is essentially Hans Ørberg's life's work. It's been adjusted and fine-tuned for decades, and it really shows.

While at a surface level it looks fairly simple, it is no small task to repeat the process with another language.

[082349872349872]

Giuseppi Peano tried to get people to learn an "unconjugated latin" by writing mathematics in it. eg https://archive.org/details/formulairedemat04peangoog/page/n... (mini rationale https://archive.org/details/formulairedemat04peangoog/page/n... )

Maybe set theory wasn't the best way of introducing a conlang, but I have to take my hat off for the weird flex.

[toto444]

I am writing one for Japanese (I was not aware of LLPSI when I started) and I use things that are common knowledge to a lot of people like set theory. I have used a few unusual things on the way.

I have recreated the UI of a fashion Ecommerce site such that the user is so familiar with the button labels ('buy', 'add to cart', 'recommended items') that they can easily guess their meanings.

I teach HTML using simple Japanese. I make use of the fact that "<span style="background-color: yellow;"> </span> " uses English words but is not English. That allows me to say things such as 'to change the background colour to yellow you can add this tag' without using English. It's definitely cheating but I have found that cheating is actually good practice when it comes to help people guess the meaning of words in a foreign language .

[marginalia_nu]

Funny, it's a bit like listening to Portugese when you've got a basic understanding of Latin. A lot of the pieces are there but they're all a bit off kilter.

[senkora]

Huh, surprisingly readable.