BIP39 stands for Bitcoin Advancement Proposal 39. The words are picked from a particular list of 2048 prevalent English words which can be accustomed to the produce a binary seed (your non-public important). Standard recovery phrases use a selected list of 2048 words subsequent the BIP39 standard (Bitcoin Enhancement Proposal https://thejillist.com/story8907828/little-known-facts-about-bip39-words