Bip39 Ian Coleman. At first you ought to shop it SEPARATELY from a seed. Having your seed plus your passphrase in a similar place defeats the goal of having a passphrase to start with. BIP39 is a design implementation that lays out how copyright wallets generate the list of words https://mysocialname.com/story4619085/bip39-words-https-linktr-ee-bip39-top-guidelines-of-bip39-mnemonic