Some facts about Tamil:
one of the Dravidian languages.
one of the Classical languages of the world.
Tamil Literature spans across the space of 2500 years.
it was the first language to develop a distinct prose form of writing among the classical languages of the world.
Tamil's origins are independent of Sanskrit (which belongs to the Indo-European language family and is the ancestor of many Indian languages), but it has borrowed a number of words from Sanskrit in recent centuries. Quite significantly for its age, Tamil seems to have undergone minimal changes and adaptations over the years.
Tamil is a member of the Tamil languages group of languages, along with Irula, Kaikadi, Betta Kurumba, Sholaga, Yerukula. The Tamil languages are a subgroup of the Tamil-Malayalam languages, which in turn is a subgroup of Tamil-Kodagu languages, a subgroup of Tamil-Kannada-Telugu languages.
Tamil is spoken mainly in the south Indian state of Tamil Nadu. Other areas where Tamil is also spoken include Sri Lanka, Singapore, and Malaysia.
Dialects of Tamil identified by the Ethnologue are: Adi Dravida, Aiyar, Aiyangar, Arava, Burgandi, Kasuva, Kongar, Korava, Korchi, Madrasi, Parikala, Pattapu Bhasha, Sri Lanka Tamil, Malaya Tamil, Burma Tamil, South Africa Tamil, Tigalu, Harijan, Sanketi, Hebbar, Tirunelveli, Madurai.
Malayalam developed from a dialect of Tamil called Koduntamil or Malaithamil (literally Tamil of the mountains), spoken by the people around the hilly ranges bordering Kerala and Tamil Nadu states.
Tamil has its own writing system, which is similar to the Brahmi script of ancient India.