The Proto-Indo-Europeans are a hypothetical prehistoric ethno-linguistic group from which the Indo-European languages are thought to have evolved. It is widely accepted that the Indo-Europeans are the ancestors of, among others, the Indo-Europeans of Europe, including the Britons. Britannica Encyclopedia provides more detailed information on this topic.

Proto-Indo-European languages are believed to have originated on the Pontic-Caspian steppe region, which covers parts of modern-day Ukraine and Russia. This location is known as the "homeland" or "Urheimat" of the Proto-Indo-Europeans based on linguistic and archaeological evidence. From this region, the Proto-Indo-European language spread and diversified into the various Indo-European languages we have today.

The Indo-European language is thought to have been spoken by a group of nomadic people known as the Proto-Indo-Europeans. They lived around 4000-2500 BCE in the Eurasian Steppes, a vast grassland stretching from Eastern Europe to Central Asia. These early speakers of the Indo-European language eventually spread out and contributed to the linguistic and cultural diversity of many regions.

John V. Day has written:

'Indo-European origins' -- subject(s): Anthropometry, History, Indo-European languages, Indo-Europeans, Origin, Proto-Indo-European language

There is no Proto-Indo-European language group. Proto-Indo-European, or PIE, is the hypothetical root language from which Indo-European languages today (and others that are extinct) descend.