Bip39 Python. At the start you should keep it Independently from your seed. Obtaining your seed plus your passphrase in the identical locale defeats the purpose of using a passphrase to start with. Indeed, BIP39 passphrases are case-sensitive. Be sure to enter your passphrase specifically when you established it up, https://webookmarks.com/story4159107/bip39-mnemonic-https-linktr-ee-bip39-5-simple-statements-about-bip39-mnemonic-explained