Bip32 and bip39 https://zenwriting.net/keenanctdp/how-to-create-a-bip39-seed-a-step-by-step-guide It is very important which the mnemonic sentences are produced from randomly selected quantities! These figures could be produced in a number of different ways, which happen to be described in other article content here, like "Exactly what is an RNG" and Seed Phrase Generation. BIP32 https://linktr.ee/bip39