Bip39 split mnemonic https://telegra.ph/Producing-Custom-Bitcoin-Addresses-A-Take-A-Look-At-BIP39-Strategies-06-28 Though it uses BIP32 strategy you could however import BIP39 seeds into Electrum wallet. Also besides BIp32 You can find BIP44 Variation which some wallet use with the generation of seeds. This will work simply because BIP39 is supported by a great number of wallet makers. https://bookmarksystem.com/story19692636/bip39-wallet-recovery-5-tips-about-bip39-checksum-you-can-use-today-https-cutt-ly-uryc5rw7