BIP39 means Bitcoin Advancement Proposal 39. The words are picked from a certain list of 2048 prevalent English words that may be used to the create a binary seed (your non-public critical). Standard recovery phrases use a selected list of 2048 words pursuing the BIP39 standard (Bitcoin Enhancement Proposal 39). https://todaybookmarks.com/story19730376/examine-this-report-on-bip39-passphrase