The area of northern Iran, northwest Iraq, northern Syria, and eastern Turkey where most of the people speak the same language is known as .

Cyprus
Israel
Kurdistan
Persia

The area of northern Iran, northwest Iraq, northern Syria, and eastern Turkey where most of the people speak the same language is known as "Kurdistan".

Option C

Explanation:

Kurdistan is an approximately established traditional geo-cultural region in which the Kurdish people make up an dominant population and their culture, languages and their national identity have traditionally been centered.

Kurdistan largely includes the mountains of the eastern Taurus and the northwest Zagros. Modern use of term relates to the following parts of the states:

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cuba is a multi-ethnic nation