Is it true that Klingon is a living language, and that people who don’t speak the same earth languages can communicate with it?

I have had conversations in Klingon, including with the guy who was trying to teach his kid to speak in Klingon. (The kid lost interest in it, and I have found a photo of the kid, 15 years later, jumping into a mosh pit. He’s turned out fine. 🙂

The vocabulary admittedly can be a little restricted in some domains. But it can be done, and I have done it.

You aren’t really going to be able to hold a conversation in Klingon, unless you’ve studied The Klingon Dictionary. The book is available in Italian and (I think) German, so in theory it is possible for two people with no common natural language to converse in Klingon. In practice, if any Klingon speaker does not understand English, I would be exceedingly surprised.