Bip39 mnemonic checksum https://orcid.org/0009-0002-7964-3457 Though it works by using BIP32 technique you'll be able to continue to import BIP39 seeds into Electrum wallet. Also aside from BIp32 There exists BIP44 Edition which some wallet use for that era of seeds. This will work because BIP39 is supported by numerous wallet https://bookmarkmargin.com/story20690245/bip39-c-about-bip39-2048-words-https-x-com-tundra838554