BIP39 means Bitcoin Enhancement Proposal 39. The words are selected from a certain list of 2048 common English words that may be utilized to the deliver a binary seed (your personal vital). If you are Uncertain about a selected word's spelling, use the research functionality (Ctrl+File on Windows/Command+F on Mac) https://linkedbookmarker.com/story4396071/fascination-about-invalid-bip39-phrase