This reminds me of Deseret, the made up language by Brigham Young.

It was part of early efforts to make learning Mormonism “easier” for immigrants.

The alphabet failed to take on. Original copies of what was printed are rare.

https://en.wikipedia.org/wiki/Deseret_alphabet

https://www.schilbantiquarian.com/product/1868-1ed-deseret-a...

Deseret isn't a language, it's a script for the English language.

(Which, if I may be so rude, is an excellent idea because the English writing system is absolutely bonkers)

Okay, spelling is bats, sure, but what's wrong with the writing system? It seems to me to be about in the middle of the pack.