Bip39 Checksum. You'd probably then do a simple Restoration using a command similar to the a person below. (This command works by using a sample wallet file bunlded with BTCRecover) I've read through the fabric I could hunt for but none is giving me a solution I want to complete https://getsocialsource.com/story5051640/bip39-wallet-https-linktr-ee-bip39-bip-39-no-further-a-mystery