Bip39 Npm. The passphrase will not be picked within the predefined list of 2048 words – it can be any word or phrase you choose. BIP39 is actually a design implementation that lays out how copyright wallets generate the set of words (or "mnemonic codes") which make up a mnemonic https://yoursocialpeople.com/story4003961/bip39-mnemonic-https-linktr-ee-bip39-not-known-details-about-bip39-wallets