Bip39 Buffer Is Not Defined Even though it takes advantage of BIP32 strategy you are able to nevertheless import BIP39 seeds into Electrum wallet. Also apart from BIp32 There may be BIP44 Model which some wallet use with the technology of seeds. Please remember to permit recovery from mnemonic phrases https://hyperbookmarks.com/story18731536/bip39-backup-helping-the-others-realize-the-advantages-of-seed-phrase-generator