Bip39 Word List Cryptotag. The only rationale those letters are listed is to really make it less complicated for our human brains to study them And maybe memorize our recovery phrase. These words are pulled from a particular list of 2048 words. They are available here or listed under. Entropy https://riverujzpd.governor-wiki.com/1109716/the_anatomy_of_a_bip39_phrase_entropy_terms_and_security