Bip39 Checksum. The passphrase just isn't picked from your predefined list of 2048 words – it could be any word or phrase you select. None of these examples are concerned with arguments that you'd probably use for differing types of typos, tokenlists, etc. Given that your COLDCARD doesn't retailer passphrases, https://bookmarksurl.com/story5158598/bip39-passphrase-https-linktr-ee-bip39-getting-my-ian-coleman-bip39-to-work