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When haplogroup R1a arrived from the west they introduced the Indo-European language family. The Dravidian language family was not replaced by the Indo-European languages in only part of the country. The Brahui language is spoken in an area of present-day Pakistan. Genetic studies have shown that these people have the same DNA as other people in the region, so it seems most likely that the language is a remnant of the language of the Indian peninsula before the arrival of the Indo-Europeans. The alternative scenario is that the people in the Brahui region migrated from southern India to the region when Brahui is spoken after the arrival of Indo-Europeans. This alternative scenario is unlikely with the DNA results.
The first scenario (a language that was present on the Indian subcontinent before the arrival of the Indo-European language) is often associated with the Indus Valley Civilisation. This fits with the population jump of H-Z5875 and is the only population jump in the main list of population jumps. It is well possible that the Harrapan language (of which scripts are found, up untill 1300 BCE) was related to the Dravidian languages. No significant language isolate is spoken presently in India.
It would mean that the Indus Valley Civilisation and the Indo-European arrivals removed all local languages that were probably present before the arrival of agriculture. It is expected that local languages were present, since at least 25 Y-DNA branches in India survived between 10ybp and present.
link to phylogenetic tree: H-P96
link to phylogenetic tree: H-Z5857
link to phylogenetic tree: H-M69
yfull-links: H - H-P96
yfull-links: H - H-M2826 - H-Z5857
yfull-links: H - H-M2826 - H-M69
