Bip39 copyright Some words are shorter than four letters, like the word “act”. Other words are extended than 4 letters, such as “summary”. Please make sure to allow recovery from mnemonic phrases that have invalid checksums (or that you don't have the wordlist) When creating your own personal seed phrase, https://45listing.com/story20604861/bip39-bip44-compatible-software-wallet-the-fact-about-bip39-phrase-that-no-one-is-suggesting