BIP39 means Bitcoin Improvement Proposal 39. The words are picked from a particular list of 2048 prevalent English words that may be accustomed to the create a binary seed (your non-public essential). Standard recovery phrases use a particular list of 2048 words pursuing the BIP39 standard (Bitcoin Enhancement Proposal 39). https://atozbookmark.com/story18686266/bip39-seed-phrase-fundamentals-explained