Bip32 and bip39 https://bip39marco.mystrikingly.com/ Even though it utilizes BIP32 system you'll be able to nevertheless import BIP39 seeds into Electrum wallet. Also other than BIp32 there is BIP44 Variation which some wallet use for your technology of seeds. For example, if you to begin with build your wallet and created https://penzu.com/p/2ea6922b70254307