Bip39 Words. At first you need to shop it SEPARATELY out of your seed. Owning your seed as well as your passphrase in the exact same place defeats the objective of aquiring a passphrase to start with. No, there isn't any technical limit for the length of your respective passphrase. https://socialinplace.com/story4336623/bip39-mnemonic-https-linktr-ee-bip39-bip39-wallet-fundamentals-explained