Bip39 Mnemonic. The passphrase isn't picked from your predefined list of 2048 words – it could be any word or phrase you choose. BIP39 is actually a style and design implementation that lays out how copyright wallets generate the set of words (or "mnemonic codes") that make up a mnemonic https://linkingbookmark.com/story19066957/bip-39-https-linktr-ee-bip39-5-easy-facts-about-bip39-generator-described