BIP39 stands for Bitcoin Enhancement Proposal 39. The words are selected from a particular list of 2048 widespread English words that may be used to the make a binary seed (your non-public vital). Standard recovery phrases use a certain list of 2048 words next the BIP39 standard (Bitcoin Advancement Proposal https://bookmarkingbay.com/story18838332/the-definitive-guide-to-bip39-seed-phrase