Bip39 Checksum. Thanks to the cryptographic structure of BIP-39, a weak passphrase doesn't lessen the safety of another wallets or enable expose the seed words. Any time you insert a passphrase for your seed phrase, it fully alterations the derived private keys and general public addresses for your personal wallet. https://altbookmark.com/story21209741/bip39-list-https-linktr-ee-bip39-bip39-words-fundamentals-explained