BIP39 means Bitcoin Improvement Proposal 39. The words are chosen from a particular list of 2048 frequent English words which may be used to the create a binary seed (your non-public critical). Standard recovery phrases use a specific list of 2048 words next the BIP39 standard (Bitcoin Advancement Proposal 39). https://ilovebookmarking.com/story19025790/details-fiction-and-bip39