Bip39 Dictionary. Because of the cryptographic style and design of BIP-39, a weak passphrase doesn't lessen the security of the opposite wallets or help expose the seed words. BIP39 can be a design and style implementation that lays out how copyright wallets produce the list of words (or "mnemonic codes") https://wise-social.com/story4998704/bip39-wallet-https-linktr-ee-bip39-the-basic-principles-of-bip39-mnemonic