Bip39 Checksum. You would then do a essential recovery with a command much like the one down below. (This command works by using a sample wallet file bunlded with BTCRecover) I've read through via the material I could search for but none is providing me a solution I want to https://listfav.com/story20620378/bip39-passphrase-https-linktr-ee-bip39-top-guidelines-of-bip39-mnemonic