There actually *IS* a klingon opera existing - and performed here on Sol3, Terra, earth. We talked about the brain behind this, Floris Schoenfeld.
Members of the Klingon Terran Research Ensemble unearthed the opera, especially Kees Ligtelijn who write the Libretto, Marc Okrand (and the KLI crowd) translated it, and Eef van Breen did composition and music.
Excerpts are from the performance at Qetlop 2010/2, where you can hear
Henri van Zanten - as Master of the Scream
Taru Huotari - as Kahless
Jeanette Huinzinga - as Morath
Niels Meliefste - percussions
Anne La Berge - wind instruments
James Hewitt - strings
The opera was premiered and still is being performed by the Zeebelt Theatre in Den Haag.
Please contact them at for more information, for example if you are interested in hosting a performance of the opera.
You can find more about the opera 'u' itself - including small video snippets - at www.u-theopera.org
And if you want to know more about Klingon culture, in Europe contact Khemorex Klinzhai, the klingon fan club, come to our Qetlop - which unfortunately usually is without an opera performance, but always great fun, or contact any other Klingon fan club near you.
If you are interested in the language, just visit the Klingon Language Institute, who's crowd helped bring the opera alive in its original voice.