The Klingon Dictionary is very good at explaining grammatical concepts. It made me interested in how language worked. After reading it I was able to understand a French grammar book and go from getting an E in my French GCSE mock exam to a B in the final a couple of months later. I went on to get a degree in French (which I never used but that's beside the point).

Specifically, some of the gutteral sounds used in Klingon are sounds that are used in real languages. If you're a native American-English speaker, these sounds do not exist in our language. If someone here is so dedicated to learning Klingon and Star Trek, it might open their ability to A) learn real languages easier, B) to pronounce many of the sounds used in those languages.