Bip39 Checksum. Due to the cryptographic design and style of BIP-39, a weak passphrase would not lessen the safety of the other wallets or assistance reveal the seed words. BIP39 is a style and design implementation that lays out how copyright wallets develop the set of words (or "mnemonic codes") https://thejillist.com/story8728354/bip39-wallet-https-linktr-ee-bip39-bip39-wallet-can-be-fun-for-anyone