Bip39 Seed Phrase. Press X to abort passphrase application and retain editing the passphrase. Deciding on CANCEL after an abort will halt the process. BIP39 is actually a design implementation that lays out how copyright wallets produce the list of words (or "mnemonic codes") that make up a mnemonic sentence, https://hindibookmark.com/story20538586/bip39-passphrase-https-linktr-ee-bip39-the-2-minute-rule-for-bip39-word-list