Bip39 specification https://ameblo.jp/generate-bip39brooks/entry-12913353546.html Although it uses BIP32 strategy you may however import BIP39 seeds into Electrum wallet. Also in addition to BIp32 There's BIP44 Edition which some wallet use for your technology of seeds. By way of example, for those who originally build your wallet and created seed utilizing Ledger https://siambookmark.com/story19879933/bip39-mnemonic-word-list-bip39-compatible-wallet-can-be-fun-for-anyone-https-linktr-ee-bip39