In order to translate this program, you need the gettext package installed.
If you have a github account, fork this repository.
Go into the po folder locally and run 'msginit --no-wrap'.
This should produce a 'LL.po' file, where 'LL' is the configured language your system is running.
Use a po file editor, such as Poedit or Lokalize, and translate the 'msgid' strings on the 'msgstr' lines inside the quotes.
You can then create a 'pull request' following github instructions.
To make corrections to an existing LL.po file, you can open the file with a po editor like poedit, make the change and save it.
Again a pull request may be submitted.