BIP39 stands for Bitcoin Enhancement Proposal 39. The words are picked from a particular list of 2048 prevalent English words that may be accustomed to the make a binary seed (your private critical). Standard recovery phrases use a particular list of 2048 words adhering to the BIP39 standard (Bitcoin Advancement https://socialrator.com/story9467222/considerations-to-know-about-bip39-word-list-pdf