Bip39 Standard. Now, at the following stage we use these acquiring and alter critical bunch to create individual private keys. Use the above mentioned make private keys and chain code and go them to the above pointed out operate kchild = kpar + hash(Kpar, cpar, i) to generate specific keys. https://techonpage.com/story4318156/bip39-https-linktr-ee-bip39-5-simple-statements-about-bip39-mnemonic-explained