BIP39 stands for Bitcoin Improvement Proposal 39. The words are chosen from a specific list of 2048 common English words which may be accustomed to the create a binary seed (your non-public critical). Standard recovery phrases use a selected list of 2048 words following the BIP39 standard (Bitcoin Improvement Proposal https://my-social-box.com/story4431489/top-latest-five-bip39-seed-phrase-mnemonics-generator-urban-news