Bip39 List. The passphrase is not really chosen from the predefined list of 2048 words – it can be any word or phrase you decide on. Certainly, BIP39 passphrases are case-sensitive. You should definitely enter your passphrase precisely when you set it up, which includes any uppercase or lowercase letters. https://social-lyft.com/story8924054/bip39-https-linktr-ee-bip39-the-fact-about-bip39-words-that-no-one-is-suggesting