Bip39 last word checksum https://penzu.com/p/2ea6922b70254307 Despite the fact that it employs BIP32 system you could still import BIP39 seeds into Electrum wallet. Also aside from BIp32 there is BIP44 version which some wallet use to the era of seeds. This extra complexity improves the hazard of misplacing the passphrase, and https://checkbookmarks.com/story5611422/bip39-vs-slip39-reddit-the-smart-trick-of-bip39-word-list-github-that-no-one-is-discussing-https-linktr-ee-bip39