Bip39 Checksum. You would then do a simple recovery by using a command such as the one under. (This command utilizes a sample wallet file bunlded with BTCRecover) No, there is not any technical Restrict to the length of your respective passphrase. Having said that, for the sake of memorability https://dailybookmarkhit.com/story18856307/bip39-wallet-https-linktr-ee-bip39-getting-my-bip39-passphrase-to-work