Bip39 Standard. You would probably then do a fundamental recovery using a command similar to the a single down below. (This command takes advantage of a sample wallet file bunlded with BTCRecover) This might contain making a immediate backup, a cryptic hint that only you'd probably have an understanding of, https://thebookmarkking.com/story19100148/bip39-generator-https-linktr-ee-bip39-5-essential-elements-for-bip-39