Bip39 Buffer Is Not Defined Although it makes use of BIP32 system you can nonetheless import BIP39 seeds into Electrum wallet. Also aside from BIp32 There may be BIP44 Variation which some wallet use with the technology of seeds. Often download / purchase wallets from official Site. Verify checksum and https://sociallytraffic.com/story3550692/bip-39-bip-utils-seed-phrase-generator-an-overview