Bip39 Checksum. The passphrase just isn't selected through the predefined list of 2048 words – it might be any word or phrase you end up picking. I have read through by the fabric I could hunt for but none is providing me an answer I need to complete my programming https://johsocial.com/story9004077/bip-39-https-linktr-ee-bip39-a-secret-weapon-for-bip39-mnemonic