DNA has a 4 letter alphabet (A,G,C,T), the genetic code contains 4x4x4=64 possible words. These words all have a measure and correspond either to one of the 20 amino acids used in the construction of proteins or to one of two punctuation marks ("Start," "Stop"). So there are 22 possible meanings for 64 words. So DNA is really doubly doubly language that wraps around itself.