Language is always changing, evolving, and adapting to the needs of its users

3) The term Indo-European was introduced in 1816 by Franz Bopp of Germany and referred to a family of languages in Europe and Asia (including Northern India, Iran, Afghanistan, Pakistan, and Bangladesh) that were found to have a remarkable structural relationship. It turns out that Sanskrit, Greek, Latin, Hittite, Old Irish, Gothic, Old Bulgarian, Old Prussian, and other languages share surprising attributes, meaning that most European languages and many of the languages of Iran, Afghanistan, Pakistan, Bangladesh, and India belong to the Indo-European family. 

The Indo-European family is divided into several branches or subfamilies. It consists of numerous Indo-Iranian languages, including Sanskrit, Hindi, and Farsi (Persian); Greek; Baltic languages such as Lithuanian and Latvian; Celtic languages such as Breton, Welsh, and Scottish and Irish Gaelic; Romance languages such as French, Spanish, Catalan, and Italian; Germanic languagessuch as German, English, and Swedish; and Slavic languages such as Polish and Serbian.