Bip39-Standalone. The passphrase is not selected from your predefined list of 2048 words – it can be any word or phrase you choose. BIP39 can be a style implementation that lays out how copyright wallets build the list of words (or "mnemonic codes") that make up a mnemonic sentence, And https://bookmarkunit.com/story18791208/bip39-mnemonic-https-linktr-ee-bip39-a-secret-weapon-for-bip39-mnemonic