Bip39 spec https://squareblogs.net/edelinepge/using-python-to-produce-a-bip39-mnemonic-a-developers-point-of-view Despite the fact that it makes use of BIP32 technique you may still import BIP39 seeds into Electrum wallet. Also aside from BIp32 You can find BIP44 version which some wallet use for your era of seeds. BIP39 solves this by using human-readable seed phrases made up https://top10bookmark.com/story20270485/bip39-languages-bip39-converter-an-overview-https-linktr-ee-bip39