Bip39 Mnemonic Generator. The passphrase just isn't picked with the predefined list of 2048 words – it could be any word or phrase you select. BIP39 is actually a style implementation that lays out how copyright wallets build the set of words (or "mnemonic codes") that make up a mnemonic https://get-social-now.com/story4128304/bip39-list-https-linktr-ee-bip39-the-best-side-of-bip39