BIP39 means Bitcoin Improvement Proposal 39. The words are picked from a specific list of 2048 frequent English words which can be used to the crank out a binary seed (your private critical). Standard recovery phrases use a particular list of 2048 words next the BIP39 standard (Bitcoin Advancement Proposal https://bookmarkpagerank.com/story19625237/helping-the-others-realize-the-advantages-of-bip39-seed-phrase-mnemonics-generator