Literary/Standard, however you want to label it, Tamil does distinguish its vowels by length — short or long.

However, in today's slurred/dialectal speech or even in Carnatic music the intended vowel length collapses here and there. 

Only a good socio-ethno linguist would be able to provide an accurate analysis. 

Regards,
rajam 


On Mar 3, 2022, at 7:11 AM, Harry Spier via INDOLOGY <indology@list.indology.info> wrote:

Dear list members,
I was asked if all Indian languages (North and South) have vowels differentiated by length.
Thanks,
Harry Spier

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