This means developer built UIs, documents, etc. could look waaay better by following simple design (typography! included) guidelines.
I believe these guidelines exist, but there's no well defined, available, or well-known "grammar" (as in this type of grammmar https://vita.had.co.nz/papers/layered-grammar.html) and there's no set of rules.
With a proper grammar and rules we could go a very long way. Other examples are
"What every engineer should know about..",
https://semver.org/ etc.