The Jaffna Tamil dialect is a Tamil dialect native to the Jaffna Peninsula and is the primary dialect used in Northern Sri Lanka and Northern parts of Trincomalee District. It preserves many antique features of Old Tamil that predate Tolkāppiyam, the earliest grammatical treatise of Tamil. The Jaffna Tamil dialect also retains many forms of words and phonemes which were used in Sangam literature such as Tirukkuṛaḷ and Kuṟuntokai, which has gone out of vogue in most Indian Tamil dialects.