What do North and South Korea Japan Mongolia have in common language wise?

The Altaic languages are a proposed language family consisting of the Turkic, Mongolic, and Tungusic languages. The Altaic languages are spoken by approximately 350 million people across a large area of Eurasia, from Turkey in the west to Mongolia in the east.

The Altaic languages are thought to have originated in Central Asia, and they spread to their current locations through a series of migrations. The Turkic languages are the most widely spoken of the Altaic languages, with approximately 200 million speakers. The Mongolic languages are spoken by approximately 10 million people, and the Tungusic languages are spoken by approximately 5 million people.

The Altaic languages are characterized by a number of common features, including:

- A subject-object-verb word order.

- A lack of grammatical gender.

- A complex system of case marking.

- A rich system of verbal conjugation.

The Altaic languages are also known for their extensive use of honorifics, which are used to show respect to older people, superiors, and strangers.