First of all, make a list of all phonemes - from easiest to hardest.
Create an alphabet that mimics each phoneme that is also simple to reproduce using seven segment displays (as a guideline).
Create a structure for nomenclature based on two things:
1. Analysis of commonality of common usage (example: words for mother/father vs duodenum)
2. Analysis of nomenclature structure: If it's a noun, how does it relate to other nouns and what it describes? Is there logic to the method of description?
Build a model of the language and test it using voice recognition. The higher the level of understanding/comprehensibility the better.
Put it out there and watch as the public completely ignores it.