Bip39 Checksum. You would then do a standard Restoration with a command much like the one down below. (This command takes advantage of a sample wallet file bunlded with BTCRecover) What constitutes a "very good wallet" is one that has apparent, simple to entry documentation on supported BIP expectations, derivation https://bookmarktiger.com/story19562148/bip39-list-https-linktr-ee-bip39-the-best-side-of-bip39-mnemonic