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Map of the distribution of Common Turkic Languages across Eurasia
Common Turkic, or Shaz Turkic, is a taxon in some classifications of the Turkic languages that includes all of them except the Oghuric languages.
Lars Johanson's proposal contains 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 Oghuric l and Common Turkic z versus Oghuric r.
In other classification schemes (such as those of Alexander Samoylovich and Nikolay Baskakov), the breakdown is different.