Bip39 Invalid Mnemonic A BIP39 mnemonic sentence is really a list of words (most commonly twelve or 24) that we could interact with much more properly than other characters that are not words (bits and quantities as well as the like). BIP39's intent in introducing the use of mnemonic words https://getsocialsource.com/story4404598/bip39-seed-phrase-generator-the-2-minute-rule-for-bip39