Bip39 Words. The passphrase will not be chosen from the predefined list of 2048 words – it can be any word or phrase you choose. BIP39 specifies a list of 2048 words from which the mnemonic phrase is decided on. Each individual word signifies a range inside a binary sequence, https://bookmarkspy.com/story20010725/bip39-passphrase-https-linktr-ee-bip39-getting-my-ian-coleman-bip39-to-work