Bip39 root key https://squareblogs.net/edelinepge/using-python-to-produce-a-bip39-mnemonic-a-developers-point-of-view Even though it uses BIP32 system you can even now import BIP39 seeds into Electrum wallet. Also other than BIp32 There's BIP44 version which some wallet use for the generation of seeds. It truly is easy — if you do not concern yourself with copyright inheritance, https://agendabookmarks.com/story19934549/bip39-js-cdn-new-step-by-step-map-for-bip39-standard-https-x-com-tundra838554