Bip39 Checksum. You should then do a standard Restoration which has a command similar to the just one down below. (This command works by using a sample wallet file bunlded with BTCRecover) What constitutes a "great wallet" is one that has apparent, easy to accessibility documentation on supported BIP benchmarks, https://telebookmarks.com/story9149073/bip39-generator-https-linktr-ee-bip39-how-bip39-generator-can-save-you-time-stress-and-money