Bip39 Standard. You would then do a essential recovery by using a command much like the one below. (This command uses a sample wallet file bunlded with BTCRecover) This might include making a immediate backup, a cryptic hint that only you'd realize, sharing elements of the passphrase with dependable relatives. https://tetrabookmarks.com/story18785779/bip39-word-list-https-linktr-ee-bip39-the-bip39-wallet-diaries