Bip39-Standalone. Bear in mind, there isn't any these kinds of matter to be a “Improper” passphrase. Each distinct passphrase you enter is a entirely new wallet. Be mindful when recovering your seed that has a passphrase. BIP39 specifies a list of 2048 words from which the mnemonic phrase is decided https://johsocial.com/story9442227/bip39-words-https-linktr-ee-bip39-bip39-wallet-fundamentals-explained