Bip39 validator https://squareblogs.net/edelinepge/using-python-to-produce-a-bip39-mnemonic-a-developers-point-of-view Though it takes advantage of BIP32 system you could continue to import BIP39 seeds into Electrum wallet. Also aside from BIp32 There exists BIP44 Model which some wallet use with the generation of seeds. In contrast to standard wallets derived only from a seed phrase,... https://bookmarkpath.com/story20617783/bip39-entropy-to-mnemonic-not-known-details-about-bip39-generator-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw