Bip39 github https://ameblo.jp/generate-bip39brooks/entry-12913353546.html Although it makes use of BIP32 method you are able to continue to import BIP39 seeds into Electrum wallet. Also other than BIp32 There may be BIP44 Model which some wallet use to the era of seeds. Want to check which wallets aid the BIP39 mnemonic recovery https://bookmarkloves.com/story23150927/bip39-russian-bip39-converter-an-overview-https-cutt-ly-uryc5rw7