Bip39 compliant passphrase https://penzu.com/p/2ea6922b70254307 Even though it works by using BIP32 system you are able to continue to import BIP39 seeds into Electrum wallet. Also apart from BIp32 You can find BIP44 Variation which some wallet use to the technology of seeds. BIP32 and BIP44 function jointly to include adaptability, https://bookmarkstown.com/story20929549/bip39-word-list-search-bip39-ian-coleman-for-dummies-https-t-me-bip39-chat