This answer has some allegedly Klingon writing. Is it Klingon? If so, what does it say?
This isn't Klingon. According to the Font of All Knowledge, there are three more or less commonly used scripts for Klingon.
Earlier script efforts do not correlate with Okrand's Klingon language, and so don't appear to be in use.
None of the Star Wars symbols match any of the Star Trek writing systems given for Klingon. ST/SW Easter Eggs are apparently a thing. This (I think obviously) is not one of them.