Bip39 Standard. Think about how you can securely back up and go about the passphrase if essential: Whilst you could possibly theoretically rely on your memory, you might want to contemplate a secure backup approach. BIP39 specifies a list of 2048 words from which the mnemonic phrase is picked out. https://socialistener.com/story4137191/bip39-generator-https-linktr-ee-bip39-the-basic-principles-of-bip39-mnemonic