Google's web-based recognizer works reasonably well on many languages (see a study in http://www.jaivox.com/googlelangs.html comparing its performance on 10 languages.) We have a new version of our library on git https://github.com/jaivox/speech that can use either the Google recognizer or Sphinx4. It also has synthesizers using Festival, Freetts, Espeak or Google's web-based TTS. The Google TTS works very well compared to the others. Google's recognizer and TTS are utilized through unofficial API's and may not be free after some test period.
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