bip39-rs
A Rust implementation of BIP0039
Add bip39 to your Cargo file, and then refer to the documentation
for use.
Only an English wordlist is included at the moment, but support for other languages is already present in the code.
A set of simple tests have been written but they only generate new mnemonics and validate a selection of known valid mnemonics generated by other tools
There is a tiny binary called bip39 that will be built by cargo,
it just generates a new nmemonic and prints the phrase and seed hex value
at the moment, but could easily be expanded to validate phrases too.