Bip39 last word checksum https://josueaqpi312.huicopper.com/leading-5-online-bip39-generators-for-easy-copyright-security BIP85: A more recent proposal letting the deterministic derivation of a number of BIP39 mnemonic seeds from a learn seed. Due to the cryptographic style of BIP-39, a weak passphrase does not reduce the safety of one other wallets or help expose the seed words. https://socialimarketing.com/story6115372/bip39-vs-bip44-new-step-by-step-map-for-bip39-word-list-txt-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw