BIP39 stands for Bitcoin Enhancement Proposal 39. The words are selected from a selected list of 2048 common English words that may be used to the produce a binary seed (your private key). Should you be unsure about a certain word's spelling, use the search function (Ctrl+F on Home windows/Command+File https://johsocial.com/story9417101/5-simple-techniques-for-bip39-seed-phrase