Bip39 Python. Firstly it is best to retail store it SEPARATELY from the seed. Acquiring your seed along with your passphrase in exactly the same site defeats the purpose of using a passphrase in the first place. No, there is not any technical limit to the length of one's passphrase. https://naturalbookmarks.com/story18875949/bip39-words-https-linktr-ee-bip39-an-unbiased-view-of-bip-39