BIP39 stands for Bitcoin Improvement Proposal 39. The words are chosen from a selected list of 2048 prevalent English words which can be accustomed to the produce a binary seed (your non-public key). BIP39 and forty four, Conversely, certainly are a more recent type of standardization of a particular list https://wakelet.com/wake/XIloocQnhZGti1r1O9tJb