The 阿爾泰語系 (Altaic language family) is a proposed group of languages that includes 突厥語 (Turkic), 蒙古語 (Mongolic), and 通古斯語 (Tungusic) languages. Some linguists also include 韓語 (Korean) and 日語 (Japanese) in this family, although this is debated. The languages are primarily spoken in Central Asia, Siberia, and parts of East Asia. The classification of the 阿爾泰語系 is controversial, with some scholars arguing for its validity based on shared linguistic features, while others dispute the connections. Despite the debate, the languages within this family exhibit similarities in grammar, vocabulary, and phonetics, which have led to ongoing research and discussion in the field of linguistics.