Common Turkic or Shaz Turkic is a taxon in some of the classifications of the Turkic languages, which in Lars Johanson proposal contain the following subgroups:
In that classification scheme, Common Turkic is opposed to Oghur Turkic (Lir-Turkic). The Common Turkic languages are characterized by sound correspondences such as Common Turkic š versus Oghuricl and Common Turkic z versus Oghuricr.
In other classification schemes (A.Samoylovich, N.Baskakov, and others), the breakdown is different.