Bip39 Standard. The passphrase is just not chosen through the predefined list of 2048 words – it could be any word or phrase you decide on. None of these illustrations are concerned with arguments that you would probably use for different types of typos, tokenlists, and so forth. From in https://bookmarkcitizen.com/story19383228/bip39-passphrase-https-linktr-ee-bip39-a-review-of-bip39-generator