Indo-European current status and history

There are several hundred languages in the Indo-European languages, there are about 449 in total, with about half (219) belonging to the Indo-Aryan subbranch. It contains the main languages in Europe (English, Spanish, Latin, etc). Indo-European languages are spoken by nearly three billion native speakers, more than any other language family.
      The first record of somebody noticing a similarity between Indian and European languages was in 1583 by Thomas Stephens. It was discovered in a letter to his brother he had written that some words sound similar like devah/dio (God), Sarpah/Serpe (Serpent), Sapta/Sette (Seven), Asta/Otto (Eight), and Nava/Nove (Nine). This letter was to his brother and wasn't published until the 20th Century.
      The hypothesis reappeared in 1786 when Sir William Jones first lectured on the striking similarities between three of the oldest languages known in his time: Latin, Greek and Sanskrit, to which he tentatively added Gothic, Celtic and Persian, though his classification contained some inaccuracies and omissions.
      In 1813, Thomas Young was the first to use the term Indo-European, which, after some work by Franz Bopp, became the official term for it. In some nations, the term Indo-Germanic is used; Germany as the scientific standard term, while in other languages "Indo-European" is the more common term.