Bip39 buffer is not defined https://www.sbnation.com/users/typhanhmdy Despite the fact that it works by using BIP32 technique you can even now import BIP39 seeds into Electrum wallet. Also aside from BIp32 there is BIP44 Edition which some wallet use with the technology of seeds. BitBox02 - A successor to your BitBox https://bookmarkick.com/story20661980/bip39-mnemonic-code-converter-tool-bip39-compatible-wallet-can-be-fun-for-anyone-https-linktr-ee-bip39