BIP39 means Bitcoin Improvement Proposal 39. The words are chosen from a certain list of 2048 popular English words which may be used to the produce a binary seed (your private critical). If you're Uncertain about a particular word's spelling, make use of the research perform (Ctrl+F on Windows/Command+F on https://listbell.com/story8586932/bip39-seed-phrase-mnemonics-generator-an-overview