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'''阿尔泰语系'''（{{lang-en|Altaic language}}，{IPAc-en|æ|l|ˈ|t|eɪ|ɨ|k}} ），别译'''阿勒泰语系'''，是19至20世纪一些[[语言学家]]按照[[语言系属分类]]方法所划分的一组[[语群]]，现如今普遍认为该分类并不成立<ref>"While 'Altaic' is repeated in encyclopedias and handbooks most specialists in these languages no longer believe that the three traditional supposed Altaic groups, Turkic, Mongolian and Tungusic, are related." Lyle Campbell & Mauricio J. Mixco, A Glossary of Historical Linguistics (2007, University of Utah Press), pg. 7.</ref><ref>"When cognates proved not to be valid, Altaic was abandoned, and the received view now is that Turkic, Mongolian, and Tungusic are unrelated." Johanna Nichols, Linguistic Diversity in Space and Time (1992, Chicago), pg. 4.</ref><ref>"Careful examination indicates that the established families, Turkic, Mongolian, and Tungusic, form a linguistic area (called Altaic)...Sufficient criteria have not been given that would justify talking of a genetic relationship here." R.M.W. Dixon, The Rise and Fall of Languages (1997, Cambridge), pg. 32.</ref><ref>"...[T]his selection of features does not provide good evidence for common descent" and "we can observe convergence rather than divergence between Turkic and Mongolic languages--a pattern than is easily explainable by borrowing and diffusion rather than common descent", Asya Pereltsvaig, Languages of the World, An Introduction (2012, Cambridge) has a good discussion of the Altaic hypothesis (pp. 211-216).</ref>。