Bip39 Ian Coleman. You'd probably then do a essential recovery which has a command much like the one underneath. (This command works by using a sample wallet file bunlded with BTCRecover) Any person else who discovers the phrase can steal the bitcoins. It should be kept top secret, for example https://onelifesocial.com/story4528521/bip39-list-https-linktr-ee-bip39-bip39-generator-an-overview