BIP39 means Bitcoin Advancement Proposal 39. The words are picked from a specific list of 2048 widespread English words which may be accustomed to the make a binary seed (your personal crucial). Standard recovery phrases use a particular list of 2048 words next the BIP39 standard (Bitcoin Advancement Proposal 39). https://dailybookmarkhit.com/story19049430/the-5-second-trick-for-ledger-seed-phrase-bip39