Bip39 Passphrase copyright Some words are shorter than four letters, such as the word “act”. Other words are lengthier than four letters, which include “summary”. The software of the wallet uses an entire set of words taken from the vocabulary; at that every word is assigned to a certain quantity. https://altbookmark.com/story20218734/bip39-words-github-not-known-details-about-bip39-word-list