Bip39 Last Word Checksum With hardly any exceptions, Most up-to-date wallets will build your seed phrase in your case once you build your wallet. BIP39 specifies a list of 2048 words from which the mnemonic phrase is selected. Each and every word represents a variety in a very binary sequence, https://ebiz-directory.com/listings516137/bip39-invalid-mnemonic-seed-phrase-generator-options