Bip39 buffer is not defined https://atavi.com/share/xbwf7vz16jgof Even though it takes advantage of BIP32 system you may nevertheless import BIP39 seeds into Electrum wallet. Also other than BIp32 There's BIP44 version which some wallet use with the generation of seeds. It can be easy — if you do not be worried https://bookmarkworm.com/story20570659/bip39-explained-bip39-github-an-overview-https-dzen-ru-bip39-phrase-com