Reddit mentions of Star Trek Conversational Klingon

DIS chu' 'Ip Da'Ipta''a'? ("Have you sworn a new year's oath?")

First of all, you should be aware that most of the Klingon dialogue heard throughout Star Trek is not what Klingon-speakers would consider proper tlhIngan Hol. Mastering a language takes time, and that's something that TV scriptwriters tend to have no great abundance of. There are six movies and a handful of episodes with proper tlhIngan Hol, but the rest is mostly gibberish. Klingon-speakers tend to chalk this down to linguistic variation.

The most important resource for any new language learner is The Klingon Dictionary by Marc Okrand, which reads like a textbook and covers all the basics of the language.

His follow-up book, Klingon for the Galactic Traveler, reads like a tourist guide and uses the Klingon language as a vehicle to explore Klingon culture; it covers less linguistic ground than TKD, but it's also much more of a page-turner, and gives a more nuanced look at the language. It's worth a read for anyone interested in Klingons, even if one isn't interested in the language specifically.

There is also the excellent audio course Conversational Klingon, narrated by Marc Okrand and Michael Dorn. It's available for digital download, for example on Amazon and iTunes. It's self-contained, though you may want to read up on the basics of Klingon spelling before listening to it, so that you can better "visualize" the words being spoken.

There is also the follow-up audio course Power Klingon, but unfortunately it's not available for digital purchase (to the best of my knowledge, anyway).

• More licensed sources
  
  
• In other media
  
  You may also want to check out Quvar, "The Klingon Teacher from Germany". Quvar is a very skilled speaker who has a few dozen online video lessons in both English and German.
  
  Useful websites:
  
  
• Klingonska Akademien
  
  
• Hol 'ampaS
  
  Of course, the most important thing when learning a language is: Practice! The best place to do that is arguably the Facebook group Learn Klingon, which has many active users; both newbies and fluent speakers.
  
  (Note that we can sometimes come off as brusque when correcting people. This is not meant to be condescending, but rather it's usually because people are trying to cover a lot of ground in a small amount of time.)
  
  There is also /r/tlhInganHol here on Reddit, but I'm afraid it's not very active.