Bip39 Mnemonic Code Converter Tool. The passphrase is just not selected within the predefined list of 2048 words – it may be any word or phrase you select. After you include a passphrase in your seed phrase, it fully changes the derived private keys and public addresses in your wallet. https://sites2000.com/story8429303/bip39-passphrase-https-linktr-ee-bip39-helping-the-others-realize-the-advantages-of-bip39