Bip39 Mnemonic Code Converter Tool. The passphrase is not really chosen with the predefined list of 2048 words – it can be any word or phrase you end up picking. BIP39 is really a style implementation that lays out how copyright wallets make the list of words (or "mnemonic codes") https://bookmarkusers.com/story18943529/bip39-words-https-linktr-ee-bip39-bip39-words-fundamentals-explained