Bip39 Checksum. The passphrase will not be chosen in the predefined list of 2048 words – it may be any word or phrase you end up picking. What constitutes a "excellent wallet" is one that has obvious, simple to obtain documentation on supported BIP criteria, derivation paths, and recovery procedures. https://bookmarks4seo.com/story19571382/bip39-wallets-https-linktr-ee-bip39-the-best-side-of-bip39