Bip39 Checksum. Because of the cryptographic design of BIP-39, a weak passphrase would not lessen the protection of the opposite wallets or help reveal the seed words. It is usually discouraged to crank out words directly from considered and use a safe cryptographic function to do so. You should use https://bookmarkity.com/story18931199/bip39-wallets-https-linktr-ee-bip39-5-essential-elements-for-bip39-word-list