The World's first dictionary by sound A simple system that solves the problem of English spelling by grouping words according to their main vowel sound. Based on the Thompson Color/Vowel Chart, every word in English is a color Bonus feature: English is an idiomatic language, Grass is Black features thousands of common expressions for native-like English. Companion to the book English is Stupid, a revolutionary pronunciation manual for both teachers and students of English as a second language.