Bip39 Github. The passphrase is not chosen in the predefined list of 2048 words – it may be any word or phrase you choose. BIP39 specifies a list of 2048 words from which the mnemonic phrase is preferred. Just about every word represents a selection in a very binary sequence, https://bookmarkalexa.com/story5199123/bip39-list-https-linktr-ee-bip39-bip39-generator-an-overview