Bip39 https://edgargvkh682.theburnward.com/a-novice-s-overview-to-getting-a-bip39-mnemonic-expression Despite the fact that it works by using BIP32 system you could still import BIP39 seeds into Electrum wallet. Also aside from BIp32 there is BIP44 Model which some wallet use for the generation of seeds. BIP39 solves this by using human-readable seed phrases composed of natural language https://bookmarkmoz.com/story20430404/bip39-passphrase-github-new-step-by-step-map-for-bip39-word-list-txt-https-dzen-ru-bip39-phrase-com