Bip39 Standard. You should then do a primary recovery by using a command like the just one under. (This command employs a sample wallet file bunlded with BTCRecover) Mnemonics are illustration of entropy. Starting point involves making a call concerning the amount entropy you think about safe to your operations. https://bookmarksden.com/story19536577/bip39-passphrase-https-linktr-ee-bip39-a-secret-weapon-for-bip39-mnemonic