incorrect or unorthodox spelling
• (n.) That method of spelling in which the same letters represent different sounds in different words, as in the ordinary English orthography; e. g., g in get and in ginger.
Het`er·og'ra·phy noun [ Hetero- + -graphy .] That method of spelling in which the same letters represent different sounds in different words, as in the ordinary English orthography; e. g., g in get and in ginger . 
heterography 1. Spelling that differs from that which is correct according to current usage; “incorrect” spelling. 2. Irregular and inconsistent spelling.heterography, heterographic, heterographical 1. Spelling that differs from that which is correct according to current usage; “incorrect” spelling. 2. Irregular and inconsistent spelling.