Bip39 c++ https://squareblogs.net/edelinepge/using-python-to-produce-a-bip39-mnemonic-a-developers-point-of-view While it utilizes BIP32 approach it is possible to still import BIP39 seeds into Electrum wallet. Also aside from BIp32 There is certainly BIP44 Model which some wallet use for that generation of seeds. Press X to abort passphrase software and preserve modifying the passphr... https://atozbookmark.com/story20102845/bip39-is-not-defined-bip39-github-an-overview-https-cutt-ly-uryc5rw7