Ok, someone once told me that Uighur is a Turkic langugage. But just wondering, for Persian and Uighur, the two, Are they similar in any way? or just helps a little bit? Could one understand another?
Your friend is right about Uighur being Turkic. But Persian is not Turkic; it's Indo-European, so lexical similarity between these languages is going to be VERY low and limited to a few loan-words. From what I can tell, the only thing that's similar is the alphabet, both having been derived from Arabic.