1. A phoneme decoding system, comprising: a non-transitory medium; one or more sentences disposed on the medium, each sentence comprising one or more words, each of the words comprising at least one letter string representative of at least one of a single-source phoneme, a silent phoneme, and a multi-source phoneme; and a symbol key defining a unique mnemonic pictogram for every multi-source phoneme of the system; wherein at least one word comprises a multi-source phoneme letter string with a unique pictogram positioned thereabove or therebelow that represents the phoneme for the given usage of the underlying letter string in the word and in the sentence, and that is the only pictogram for all letter strings associated with said phoneme; all of the letter strings disposed on said medium form all or part of said one or more words disposed on said medium; and all of the pictograms are positioned above or below the letter strings they represent.