▁Sri ▁L ank an ▁T amil ▁dialect s ▁or ▁C ey lon ▁T amil ▁dialect s ▁form ▁a ▁group ▁of ▁T amil ▁dialect s ▁used ▁in ▁the ▁modern ▁country ▁of ▁Sri ▁L anka ▁by ▁Sri ▁L ank an ▁T amil s ▁and ▁Mo ors ▁that ▁is ▁distinct ▁from ▁the ▁dialect s ▁of ▁modern ▁T amil ▁spoken ▁in ▁T amil ▁N adu ▁. ▁T amil ▁dialect s ▁are ▁differenti ated ▁by ▁the ▁ph on ological ▁changes ▁and ▁sound ▁sh ifts ▁in ▁their ▁evolution ▁from ▁classical ▁or ▁Old ▁T amil ▁( 3 0 0 ▁BC ▁- ▁ 7 0 0 ▁CE ). ▁It ▁is ▁broad ly ▁categor ized ▁into ▁four ▁sub ▁groups : ▁J aff na ▁T amil , ▁Batt ical oa ▁T amil , ▁up ▁country ▁Indian ▁origin ▁T amil s ▁and ▁Neg om bo ▁T amil ▁dialect s . ▁These ▁dialect s ▁are ▁also ▁used ▁by ▁eth nic ▁groups ▁other ▁than ▁T amil s ▁such ▁as ▁Sin hal ese ▁people , ▁Sri ▁L ank an ▁Mo ors ▁and ▁V ed das , ▁who ▁consider ▁them ▁to ▁be ▁distinct . ▁ ▁Character istics ▁As ▁T amil ▁is ▁a ▁dig loss ic ▁language ▁the ▁differences ▁between ▁the ▁standard ▁written ▁languages ▁across ▁the ▁glo be ▁is ▁minimal ▁but ▁the ▁spoken ▁vari eties ▁differ ▁consider ably . ▁The ▁spoken ▁vari eties ▁in ▁Sri ▁L anka ▁although ▁different ▁from ▁those ▁of ▁T amil ▁N adu ▁share ▁some ▁common ▁features ▁between ▁the ▁southern ▁dialect s ▁of ▁T amil ▁N adu ▁and ▁the ▁northern ▁Sri ▁L ank an ▁T amil