Tamils have strong feelings towards the Tamil language, which is often venerated in literature as ""Tamil̲an̲n̲ai"", "the Tamil mother". It has historically been, and to large extent still is, central to the Tamil identity. Like the other languages of South India, it is a Dravidian language, unrelated to the Indo-European languages of northern India. The language has been far less influenced by Sanskrit than the other Dravidian languages, and preserves many features of Proto-Dravidian, though modern-day spoken Tamil in Tamil Nadu, freely uses loanwords from Sanskrit and English. Tamil literature is of considerable antiquity, and is recognised as a classical language by the government of India.

Classical Tamil literature, which ranges from lyric poetry to works on poetics and ethical philosophy, is remarkably different from contemporary and later literature in other Indian languages, and represents the oldest body of secular literature in South Asia. Notable works in classical Tamil literature include the Tirukkural, by Tiruvalluvar, the five great Tamil epics, and the works of Auvaiyar. 

Modern Tamil literature is diverse. It includes Indian Nationalism, in the works of Subramanya Bharathi; historical romanticism, by Kalki Krishnamurthy; radical and moderate social realism, by Pudhumaipithan and Jayakanthan; and feminism, by Malathi Maithri and Kutti Revathi. Sujatha Rangarajan, an author whose works range from romance novels to science fiction, is one of the most popular modern writers in Tamil. Sri Lankan Tamil literature has produced several works reflecting the civilian tragedy caused by decades of war. There is also an emerging diaspora literature in Tamil.

There are a number of regional dialects in use by the Tamil people. These dialects vary among regions and communities. Tamil dialects are mainly differentiated by the disparate phonological changes and sound shifts that have evolved from Old Tamil. Although most Tamil dialects do not differ significantly in their vocabulary, there are a few exceptions. The dialects spoken in Sri Lanka retain many words that are not in everyday use in India, and use many other words slightly differently. The dialect of the Iyers of Palakkad has a large number of Malayalam loanwords, has been influenced by Malayalam syntax, and has a distinct Malayalam accent. The Sankethi, Hebbar, and Mandyam dialects, the former spoken by groups of Tamil Iyers, and the latter two by Vaishnavites who migrated to Karnataka in the 11th century, retains many Vaishnavite religious and spiritual values. The Tamil spoken in चेन्नई infuses English words, and is called "Madras Bashai" (Madras language).

संस्था
भाषा/बोली आणि साहित्य
भारतीय तमिळ
श्रीलंकन तमिळ