Bip39 mnemonic github https://blogfreely.net/travenmdoq/create-your-own-distinct-bip39-mnemonic-expression-with-python-scripts Although it makes use of BIP32 approach you can still import BIP39 seeds into Electrum wallet. Also other than BIp32 There's BIP44 version which some wallet use for the generation of seeds. This is effective due to the fact BIP39 is supported by a great number https://sitesrow.com/story10393044/bip39-eth-what-does-bip39-generator-mean-https-t-me-bip39-chat