The book "Theoretical-Applied Aspects of Linguistic Study" offers a comprehensive analysis of the role of language in human existence and its influence on the culture and identity of a nation. It highlights the linguistic diversity and cultural traditions of the Republic of Kazakhstan, particularly in the context of independence. The authors, Bikesh Ospanova and Nursulu Kassenova, discuss the significance of multilingualism and its impact on personal competitiveness in an increasingly globalized world. The work also addresses the legal frameworks established to promote language diversity in Kazakhstan, including the Language Law and the corresponding state programs. This academic book is aimed at students, researchers, and professionals engaged in linguistic studies and the role of language in society.