Bip39 Passphrase. The passphrase is just not selected from the predefined list of 2048 words – it can be any word or phrase you end up picking. What constitutes a "great wallet" is one that has obvious, straightforward to entry documentation on supported BIP expectations, derivation paths, and recovery processes. https://mysitesname.com/story8507856/ian-coleman-bip39-https-linktr-ee-bip39-a-review-of-bip39-words