BIP39 means Bitcoin Improvement Proposal 39. The words are selected from a particular list of 2048 widespread English words which can be used to the make a binary seed (your personal vital). Standard recovery phrases use a particular list of 2048 words subsequent the BIP39 standard (Bitcoin Enhancement Proposal 39). https://extrabookmarking.com/story18865289/fascination-about-invalid-bip39-phrase