Bip39 Mnemonic Code A BIP39 mnemonic sentence is really a set of words (most commonly 12 or 24) that we can connect with a lot more properly than other characters that aren't words (bits and figures as well as the like). BIP39's intent in introducing the usage of mnemonic words https://socialupme.com/story4098688/bip-39-passphrase-not-known-facts-about-bip39-phrase