BIP39 stands for Bitcoin Advancement Proposal 39. The words are chosen from a particular list of 2048 widespread English words which may be used to the generate a binary seed (your private essential). Standard recovery phrases use a selected list of 2048 words adhering to the BIP39 standard (Bitcoin Improvement https://health-lists.com/story19471432/the-2-minute-rule-for-bip39-all-words