Years ago, Reginald J. G. Dutton created a shorthand writing system that shortened common words, and called them Speedwords.
With this, maybe overly confusing, system, words like but, you and because become b, v and zi, respectively.
If you’re interested in implementing such a system in your shorthand lexicon, check out Jonathan Aquino’s Cheatsheet for Speedwords shorthand system.
For a brief history, list of words and pronunciation, check this Overview of Speedwords.
Would, or do, you implement such a shorthand language?