Bip39 Word List Mnemonic. The sole explanation Those people letters are listed is to really make it less difficult for our human brains to read through them And maybe memorize our recovery phrase. These words are pulled from a specific list of 2048 words. They can be found listed here https://financegoogle70369.wikikarts.com/1102717/the_anatomy_of_the_bip39_phrase_entropy_words_and_phrases_and_safety