Bip39 hash https://www.demilked.com/author/gobnettlmz/ Though it employs BIP32 method you may however import BIP39 seeds into Electrum wallet. Also besides BIp32 There's BIP44 Variation which some wallet use for the generation of seeds. It's uncomplicated — if you do not worry about copyright inheritance, nobody else will — not your application https://blogfreely.net/travenmdoq/create-your-own-distinct-bip39-mnemonic-expression-with-python-scripts