It has even become a cliché that "to learn a new language is to adopt a new soul". There are many other examples of the essential significance of language. In pre-Russian Siberia, Tatar-Mongol colonists in the Taiga often recognized indigenous speakers of Turkic languages as their "own people" and non-Turkic groups as "foreigners", despite these indigenous groups having a similar level of material culture, and sharing much of a primitive culture with tribes foreign to the Muslim-Buddhist Tatar-Mongols.