Each colour corresponds to a sound in the language.The colour code is the same as that of the fidel and word charts. This chart enables students to work with precision on the fine phonetical distinctions of the language in question. They can refine their capacity to produce the sounds of the language with the melody and rhythm necessary.  It is this capacity to produce the sounds themselves which will lead to their being able understand the spoken language.

Only the structural vocabulary of the language (about 500 words) is included: pronouns, articles, prepositions, common adjectives and adverbs, conjunctions, auxiliary 
verbs and a few other common verbs but very few nouns.
The use of colour enables students to read directly in languages with a different alphabet or characters and to pronounce correctly what they read.