India is a country with diversified languages. The country has seen a lot of changes regarding language formula in its education system, since ancient days. Though English and Hindi were official languages of the country, vernacular languages dominated the local state of affairs in each State. In this scenario, the present article focuses on the pros and cons on inculcating mother tongue as medium of instruction vis-à-vis Global Language. While dealing with the significance of vernacular language, the article also highlights the advantages of global language as medium of instruction. Concomitantly, the detriments of vernacular language and global language as medium of instruction are also described. On a study of the opportunities and obstacles, it has been felt that a balance has to be struck between both the languages. Besides, the legal components driving the Indian education system viz., Articles 19, 21, 26, 29, 30 and 350A of the Constitution of India, Directive Principles of State Policy and Right to Information Act are also dealt in the article.