BIP39 means Bitcoin Improvement Proposal 39. The words are picked from a specific list of 2048 prevalent English words which can be used to the crank out a binary seed (your private critical). Standard recovery phrases use a specific list of 2048 words adhering to the BIP39 standard (Bitcoin Enhancement https://ilovebookmark.com/story19491842/the-fact-about-valid-bip39-seed-phrase-that-no-one-is-suggesting