The national language of Kazakhstan is Kazakh. The official languages are Kazakh and Russian. Besides, there are many young people who master English.
Kazakh belongs to Turkic language family, while Russian belongs to Slavic language family. Similar to the difference between Chinese and English, it is really the opposite. However, due to the influence of the former Soviet Union, there are many foreign words from Russian in Kazakh.
The rest of the information about Kazakhstan can be found in Baidu Encyclopedia: Web page link.
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—————————————————————————————— Wandering in Russia and joining in it.