"Proto-Indo-European is the linguistic reconstruction of the common ancestor of the Indo-European languages. There are about
445 living Indo-European (IE) languages. The following IE languages are listed in descending order by native speakers,
with all having at least 80 million: Spanish, English, Portuguese, Bengali, Hindi, Russian, Punjabi, German, and French.
Since there is no written record of this language, it has been reconstructed using historical linguistics. It is thought that Proto-Indo-European (PIE) may have been spoken as a single language (before divergence began) around 3500 BC, though estimates vary by more than a thousand years. The original speakers may have originated in the Pontic–Caspian steppe of Eastern Europe, north of the Black Sea. As Proto-Indo-European speakers became isolated from each other through migration, the language spoken by those groups diverged."
https://en.wikipedia.org/wiki/Proto-Indo-European_language
"The Indo-European languages are a family of several hundred related languages and dialects. There are about 445 living Indo-European languages, according to the estimate by Ethnologue, with over two-thirds (313) of them belonging to the Indo-Iranian branch. The most widely spoken Indo-European languages by native speakers are Spanish, English, Hindi, Portuguese, Bengali, Russian, and Punjabi, each with over 100 million speakers.
Today, 46% of the human population speaks an Indo-European language, by far the most of any language family."
https://en.wikipedia.org/wiki/Indo-European_languages