Generate bip39 passphrase https://www.empowher.com/user/4550298 Though it utilizes BIP32 system you could continue to import BIP39 seeds into Electrum wallet. Also other than BIp32 There's BIP44 version which some wallet use for the generation of seeds. This functions for the reason that BIP39 is supported by lots of wallet brands. As https://www.cheaperseeker.com/u/adeneuwaks