Bip39 format https://felixkkjt585.theglensecret.com/bip39-word-checklist-generator-crafting-your-own-special-seed-phrase While it makes use of BIP32 system you could still import BIP39 seeds into Electrum wallet. Also other than BIp32 There may be BIP44 Model which some wallet use with the technology of seeds. BitBox02 - A successor for the BitBox sequence, this components wallet supp... https://papaly.com/1/eMEf