Bip39 Compatible Non Custodial Wallet. The sole purpose People letters are listed is to really make it much easier for our human brains to go through them and possibly memorize our recovery phrase. A standard 12-word mnemonic phrase is widely used on account of its manageable duration and enough safety. https://andreswmzoc.cosmicwiki.com/1125591/the_anatomy_of_the_bip39_phrase_entropy_words_and_stability