BIP39 stands for Bitcoin Enhancement Proposal 39. The words are selected from a certain list of 2048 typical English words which may be used to the produce a binary seed (your private vital). Standard recovery phrases use a certain list of 2048 words adhering to the BIP39 standard (Bitcoin Enhancement https://ok-social.com/story4387360/bip39-phrase-generator-can-be-fun-for-anyone