Bip39 generator github https://squareblogs.net/edelinepge/using-python-to-produce-a-bip39-mnemonic-a-developers-point-of-view While it takes advantage of BIP32 method you can continue to import BIP39 seeds into Electrum wallet. Also aside from BIp32 There exists BIP44 Model which some wallet use to the era of seeds. Since adding a passphrase to the seed words makes a different wallet, https://thebookmarkplaza.com/story20737777/bip39-mnemonic-checksum-the-greatest-guide-to-bip39-https-t-me-bip39-chat