Bip39 library http://www.video-bookmark.com/user/tucanewhmt It is very important that the mnemonic sentences are generated from randomly selected numbers! These quantities is often produced in many different other ways, which might be explained in other article content right here, like "What is an RNG" and Seed Phrase Technology. BIP39 solves this through https://bookmarkangaroo.com/story20182115/bip39-standard-everything-about-bip39-word-list-txt-https-t-me-bip39-chat