BIP39 means Bitcoin Advancement Proposal 39. The words are picked from a particular list of 2048 typical English words which can be accustomed to the generate a binary seed (your personal vital). Standard recovery phrases use a specific list of 2048 words subsequent the BIP39 standard (Bitcoin Improvement Proposal 39). https://bookmarkssocial.com/story18759200/how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-seed-phrase-mnemonics-generator