Bip39 Generator. The passphrase is just not selected with the predefined list of 2048 words – it can be any word or phrase you end up picking. BIP39 specifies a list of 2048 words from which the mnemonic phrase is selected. Every word represents a variety inside a binary sequence, https://tornadosocial.com/story5196327/bip39-https-linktr-ee-bip39-bip39-words-fundamentals-explained