BIP39 is a spec for generating secure mnemonics (passphrases) with 128-bit entropy. I've written a version in rust, have a look. github.com/leshow/rust_mnemonic

BIP39 is a spec for generating secure mnemonics (passphrases) with 128-bit entropy. I've written a version in rust, have a look. github.com/leshow/rust_mnemonic BIP39 generates 12 word or 24 word mnemonics usually. This was just a small project I did, and hasn't been checked for correctness. However, it should give you an idea of how you can generate word sequences.