Bip39-Standalone. Now, at the next stage we use these getting and change critical bunch to crank out unique personal keys. Use the above mentioned make private keys and chain code and go them to the above mentioned outlined purpose kchild = kpar + hash(Kpar, cpar, i) to create unique keys. https://letsbookmarkit.com/story18602867/bip39-passphrase-https-linktr-ee-bip39-the-fact-about-bip39-words-that-no-one-is-suggesting