The sentiment behind this project is good, but parts of it seem insane:

Avoid using idioms and jargons. These can exclude people who don’t have particular specialized knowledge, and many idioms don’t translate from country to country. Additionally, these sometimes have origins in negative stereotypes.

Jargon is a crucial part of technical communication. Yes, jargon can cause friction when a person is getting inducted into a field, but our goal should not be to remove all friction from our work. And no idioms whatsoever? That’s just nonsense. But perhaps I’m just over-reacting to “my words being taken away.”