Bip39 last word checksum https://franciscougju442.bravesites.com/entries/general/Produce-Bitcoin-Addresses-from-Seed-Every-Little-Thing-You-Required-to-Know While it uses BIP32 system it is possible to continue to import BIP39 seeds into Electrum wallet. Also besides BIp32 There's BIP44 Edition which some wallet use for your technology of seeds. This is effective since BIP39 is suppor... https://edgargvkh682.theburnward.com/a-novice-s-overview-to-getting-a-bip39-mnemonic-expression