BIP39 stands for Bitcoin Advancement Proposal 39. The words are chosen from a selected list of 2048 frequent English words that may be used to the make a binary seed (your non-public crucial). Standard recovery phrases use a selected list of 2048 words following the BIP39 standard (Bitcoin Improvement Proposal https://indexedbookmarks.com/story18852766/a-secret-weapon-for-bip39-words-to-numbers