Classical Language

According to Wiki, a language to attain a Classical Language status should meet one of the following criteria.
1] A Classical Language is a language with a literature that is "classical"—ie, "it should be ancient, it should be an independent tradition that arose mostly on its own, not as an offshoot of another tradition, and it must have a large and extremely rich body of ancient literature.This one is as said by George L. Hart[a professor of Tamil language at the University of California, Berkeley.] who proposed Tamil should be tagged Classical status.
2]A language should have a broad influence over an extended period of time, even after it is no longer a colloquial mother tongue in its original form. If one language uses roots from another language to coin words (in the way that many European languages use Greek and Latin roots to devise new words such as "telephone" etc.), this is an indication that the second language is a classical language. Wiki also hints there could be other external factors that judge a language to be classical.