How does bip39 work https://blogfreely.net/travenmdoq/create-your-own-distinct-bip39-mnemonic-expression-with-python-scripts Though it utilizes BIP32 process you are able to nevertheless import BIP39 seeds into Electrum wallet. Also aside from BIp32 There's BIP44 version which some wallet use for your generation of seeds. Exactly how much security does a passphrase add? A BIP39 passph... https://bouchesocial.com/story22396646/bip39-gpu-new-step-by-step-map-for-bip39-word-list-txt-https-dzen-ru-bip39-phrase-com