this is known since early xix century! The family is indoeuropean which subdivides in branches as indo-arian, indo-iranian and indoeuropean. Not all, Fino-ugric in Europe (finnish, estonain, magyar, etc) and Basque, in Europe, and dravidian (tamil, malayalam, tegulu, brahui) and some sino-tibetan languages in India dont belong to this family. Indoeuropeans (Arians, when referring to the "original" peoples) are supossed to be originary of Central Asia, (more or less about north west of present Afghanistan). And it is called "proto-language" not pre-language (which is a different thing). All modern languages come from a protolanguage, called this way cause there are no documents to ascertain how the languages were, except the traces you find commonly shared by a group of languages. etc, etc.

Many words in Russian and English sound similar and have the same meaning! For example: water -вода [voda] war - война [voina] to be - быть [bit] t sounds very soft at the end many - много [mnogo] small - маленький [malenkij], мал [mal] to call - колокол [kolokol] it`s noun. English translation is a bell. The bell calls.

Please correct my grammar, if I have made mistakes