Bip39 add private key https://writeablog.net/ipennywpzc/the-ultimate-overview-to-offline-bip39-generators-remain-secure Despite the fact that it works by using BIP32 system you may still import BIP39 seeds into Electrum wallet. Also aside from BIp32 There is certainly BIP44 version which some wallet use for your era of seeds. Simply because adding a passphrase towards your seed https://bookmarkick.com/story20137112/bip39-checksum-failed-not-known-factual-statements-about-bip39-word-list-txt-https-dzen-ru-bip39-phrase-com