Bip39 Checksum. The passphrase isn't selected through the predefined list of 2048 words – it can be any word or phrase you end up picking. notify your wallet How to define your coins guiding it in the tree and are explained in Bitcoin Enhancement Proposals (BIP). BIP-32 hierarchical deterministic wallet. https://natural-bookmark.com/story18744703/bip39-list-https-linktr-ee-bip39-a-review-of-bip39-word-list-pdf