Bip39 Last Word Checksum A BIP39 mnemonic sentence is often a set of words (most often 12 or 24) that we could connect with a lot more productively than other characters that are not words (bits and numbers plus the like). BIP39's objective in introducing the usage of mnemonic words https://web.archive.org/web/20241123074420/https://bip39-phrase.com/