Bip39. You'd probably then do a simple Restoration by using a command much like the one down below. (This command works by using a sample wallet file bunlded with BTCRecover) BIP39 is really a style implementation that lays out how copyright wallets generate the list of words (or "mnemonic codes") https://bookmarklethq.com/story19506816/bip39-word-list-https-linktr-ee-bip39-top-guidelines-of-bip39-passphrase