BIP39 means Bitcoin Advancement Proposal 39. The words are chosen from a selected list of 2048 common English words which can be utilized to the create a binary seed (your personal key). When you are Doubtful about a specific word's spelling, use the research function (Ctrl+F on Home windows/Command+F on https://health-lists.com/story19445240/the-basic-principles-of-bip39-passphrase-generator