Bip39 Vs Slip39. The passphrase is not picked with the predefined list of 2048 words – it may be any word or phrase you choose. Any person else who discovers the phrase can steal the bitcoins. It needs to be saved secret, one example is it must not be typed https://mixbookmark.com/story4377107/bip39-list-https-linktr-ee-bip39-bip39-wallet-can-be-fun-for-anyone