Klingon Language in Star Trek Movies

[KHruj]

Just curious which Star Trek movies are best for learning the language from... I am guessing IV, V, and VI for the amount of dialog used?

Also, which are most grammatically correct, and in what order would you place their importance?

Thanks in advance!

[tesseraktik]

III, V and VI.

All of them have Klingon dialogue written by Marc Okrand, so they're all correct by default.
Star Trek V has the best pronunciation, and some fairly long scenes in Klingon.

Transcripts: http://www.kli.org/tlhIngan-Hol/2008/October/msg00037.html