BIP39 stands for Bitcoin Improvement Proposal 39. The words are picked from a certain list of 2048 widespread English words that may be accustomed to the create a binary seed (your non-public vital). Standard recovery phrases use a specific list of 2048 words pursuing the BIP39 standard (Bitcoin Enhancement Proposal https://bookmarkingdelta.com/story18794703/bip39-seed-phrase-mnemonics-generator-an-overview