Bip39 documentation https://www.cheaperseeker.com/u/adeneuwaks Though it employs BIP32 approach you'll be able to however import BIP39 seeds into Electrum wallet. Also besides BIp32 You can find BIP44 version which some wallet use to the technology of seeds. As opposed to standard wallets derived only from the seed phrase, passphrase-secured wallets are https://jsbin.com/titaniseko