Bip39 Format. From this level forward the seed may be written on paper or spoken around telephone which opened up new, physical means of backing up the seed (multiple paper copies in several locations, long lasting copies on metal plates with further protection from hearth/flood etc.). You signed in with https://socialdosa.com/story8571702/bip39-mnemonic-word-list-the-single-best-strategy-to-use-for-bip39-english-word-list