The Klingon language was not based on any other language, but was crafted by a professional linguist, Dr. Marc Okrand, to work as its own language:
"...the producers called on professional linguist Dr. Marc Okrand to create authentic speech for the Klingons. His task was to make their language as alien as their ridged prosthetic foreheads, while still remaining pronounceable by human actors and consistent with the battle cries from the first movie.
Dr. Okrand did not base Klingon on any particular language, but drew on his knowledge of how language works to construct a wholly new language."
This isn't from Wikipedia, which is notoriously inaccurate, but from the Klingon Institute, a site dedicated to keeping the language alive, teaching the language to others, and connecting people that appreciate the language.
As for ANY connection to Tibetan, that is something never mentioned by the creator of the language. See 2) below.
As for downvoting me due to the unclear question, hmphhh.
The first source link is now corrected.