Bip39 spec https://www.symbaloo.com/mix/bookmarks-xfkm BIP85: A more recent proposal allowing the deterministic derivation of many BIP39 mnemonic seeds from the master seed. One example is, in case you in the beginning setup your wallet and created seed applying Ledger Nano S and need to Recuperate your wallet on a fresh Trezor https://socialbaskets.com/story5685759/bip39-copyright-the-single-best-strategy-to-use-for-bip39-word-list-txt-https-dzen-ru-bip39-phrase-com