Ural-Altaic languages

\nzh-cn:乌拉尔-阿尔泰语系 Some linguists propose the Ural-Altaic grouping of the\nAltaic languages (Turkish, Mongolian,\nKazakh, Uzbek, Tatar, Manchu, etc., plus perhaps\nKorean and Japanese) and Uralic languages\n(Hungarian, Finnish and\nEstonian mostly) into one language group.\nThis theory is debated and since nowdays even existence of Altaic language family as genetical relatives is highly controversial, the whole Ural-Altaic theory has faced strong criticism among linguistics. This proposed language family and the speakers are also known as the Turanian. The term derives from the Persia word for places beyond the Oxus, Turān. Both groups follow the principle of vowel harmony, are agglutinative\n(stringing suffixes, prefixes or both onto a single root) and lack any way for expressing\ngrammatical gender (see noun case).\nHowever this is not necessarely proof for genetic relationship and the vocabulary of both groups does not correspond, except for borrowings.