Bip39. Don't forget, there is no this sort of issue being a “wrong” passphrase. Each and every unique passphrase you enter is usually a entirely new wallet. Watch out when recovering your seed using a passphrase. BIP39 specifies a list of 2048 words from which the mnemonic phrase is chosen. https://bookmarkchamp.com/story18609708/bip39-word-list-pdf-https-linktr-ee-bip39-a-review-of-bip39-generator