Tamil is spoken by the Tamil people
of South Asia, in southern India and Sri Lanka. It is also spoken in
Malaysia, the UK, South Africa, Canada, the USA, Singapore,
France, Mauritius, and many other countries. Tamil is an official
language of the Indian state of Tamil Nadu, the sovereign nations
of Sri Lanka and Singapore, and the Indian Union territory of
Puducherry.
Tamil is used as a language of education in Malaysia and
Singapore. Tamil is one of the longest-surviving classical
languages of India. The earliest known inscriptions in Tamil date
back to about 500 BC. Tamil literature started to apper in 300 BC,
and the language used until the 700 AD is known as Old Tamil.
From 700-1600 AD the language is known as Middle Tamil, and
since 1600 the language has been known as Modern Tamil.
Although Tamil dialects do not differ significantly in their
vocabulary, there are a few exceptions. The dialects spoken in Sri
Lanka retain many words and grammatical forms that are not in
everyday use in India, and use many other words slightly
differently. Tamil dialects include Central Tamil dialect, Kongu
Tamil, Madras Bashai, Madurai Tamil, Nellai Tamil, Kumari Tamil
in India; Batticaloa Tamil dialect, Jaffna Tamil dialect, Negombo
Tamil dialect in Sri Lanka; and Malaysian Tamil in Malaysia.
Sankethi dialect in Karnataka has been heavily influenced by
Kannada.
Sources: Wikipedia
https://omniglot.com/writing/tamil.htm