The spelling of the word "trapps" may seem unconventional at first, but it follows the rules of English phonetics. The double "p" indicates a short vowel sound, IPA /æ/, as in "trap." The double "s" indicates a voiced "z" sound, IPA /z/, which follows the rule of adding a voiced sound after an unvoiced consonant at the end of a word. Therefore, "trapps" is pronounced as /træpz/, and written in accordance with English phonetic norms.